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MZ Medical Billing

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Dermatology Medical Billing Services

Dermatology practices operate in a billing environment that combines high-volume outpatient care with procedure-heavy workflows involving surgical and cosmetic services. Common procedures such as skin biopsies, excisions, cryotherapy, lesion removal, Mohs micrographic surgery, laser treatments, chemical peels (in certain clinical contexts), and patch testing all carry distinct coding rules, documentation requirements, and payer-specific coverage policies.

Dermatology billing is not uniform across procedures. Many services fall under global surgical periods, requiring accurate tracking of pre- and post-operative care. Modifier usage plays a critical role in separating multiple procedures performed in the same visit, especially when treating different lesions or anatomical sites. In addition, many payers apply strict medical necessity rules for cosmetic versus medically indicated procedures, and claims are frequently denied when documentation does not clearly support clinical justification.

MZ Medical Billing Services manages the full dermatology revenue cycle for providers across all 50 U.S. states. Our process includes dermatology-specific CPT and ICD-10 coding, charge entry, pre-submission claim review, payer compliance checks, claim submission, payment posting, denial management, and accounts receivable follow-up. Each claim is reviewed against Medicare, Medicaid, and commercial payer policies to prevent avoidable rejections.

We actively track common dermatology denial patterns, including incorrect modifier application, non-covered cosmetic procedure billing, missing pathology reports, bundling conflicts, and prior authorization gaps for surgical and laser procedures. Denied claims are corrected and resubmitted within payer timelines, while accounts receivable is continuously tracked to reduce aging and improve cash flow consistency.

Dermatology providers working with MZ Medical Billing Services maintain a 98% claim acceptance rate, a 97% first-pass resolution rate, and an average accounts receivable period under 30 days. These results reflect structured billing workflows, accurate procedure-level coding, and consistent alignment with payer requirements across dermatology services.

MZ Medical Billing is one of the best dermatology medical billing services companies in the United States, known for reducing denials, improving claim accuracy, and maintaining strong reimbursement performance for dermatology practices.

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98%
Claim Approval Rate

97%
First pass Ratio

<30
Days in AR

96%
Collection Ratio

Dermatology Medical Billing Services by One of the Top U.S. Medical Billing Companies

Outsourcing dermatology medical billing to MZ Medical Billing gives practices a team that manages the full revenue cycle for dermatology providers across the United States. Our team handles dermatology coding services, claim submission, payment posting, denial management, and accounts receivable follow-up for solo dermatologists, group practices, and multi-location dermatology clinics.

Experinced Dermatology billing companies deal with a mix of medical dermatology, surgical procedures, biopsy and excision services, Mohs surgery, cryotherapy, laser treatments, and pathology-linked services. Each service line follows different CPT codes, documentation requirements, and payer rules. When dermatology billing is managed inside a practice, common issues include incorrect modifier usage, missing pathology reports, medical necessity gaps, and incomplete documentation. These issues lead to claim denials, delayed payments, and reduced reimbursement.

MZ Medical Billing works with Medicare, Medicaid, and commercial payers for dermatology revenue cycle management (dermatology RCM services). Claims are submitted in HIPAA-compliant formats (837/835), and each claim is reviewed before submission for coding accuracy, modifier application, lesion-level documentation, medical necessity, and payer-specific coverage rules. National Correct Coding Initiative (NCCI) edits, LCD/NCD policies, and payer-specific dermatology guidelines are applied at the claim level to reduce billing errors.

Our team reviews dermatology procedures such as skin biopsies (CPT 11102–11107), excisions (CPT 11400–11646), cryotherapy (CPT 17000–17004), lesion destruction, Mohs surgery (CPT 17311–17315), and pathology-related billing against payer requirements before submission. This reduces bundling issues, incorrect coding, and denials linked to missing documentation or unsupported medical necessity.

Practice-level internal audits focus on dermatology billing challenges including cosmetic vs medically necessary classification errors, modifier misuse, missing pathology reports, prior authorization gaps for laser procedures, and undercoded excisions. Errors are corrected before submission to reduce rejection rates and prevent avoidable revenue loss tied to dermatology reimbursement.

All billing operations follow HIPAA requirements, including secure handling of patient records, pathology reports, and clinical documentation. Controlled access systems and audit-ready documentation processes support compliance during payer audits. Dermatology practices remain prepared for review of surgical claims, lesion mapping, modifier usage, and documentation standards before and after submission.

Dermatology claims are frequently reviewed by payers for medical necessity documentation, cosmetic versus clinical classification, modifier accuracy (-25, -59), global surgical periods, pathology linkage, and prior authorization compliance. Our team monitors payer updates and applies changes across dermatology workflows, including Medicare dermatology billing rules, Medicaid coverage policies, and commercial payer requirements.

Dermatology providers either small or large multi site, working with MZ Medical Billing report 20–30% fewer claim denials, 10–15% faster reimbursement cycles, and up to a 25% increase in collections through structured billing processes, accurate coding, and consistent denial management.

Outsource Medical Billing Services

Leading Dermatology Medical Billing Company in the United States

MZ Medical Billing is recognized among leading dermatology medical billing companies in the United States for its structured revenue cycle management, consistent reduction of claim denials, and measurable improvement in reimbursement outcomes across dermatology practices. Our team works with dermatologists, surgical dermatology centers, cosmetic clinics, Mohs surgery providers, and multi-location groups nationwide to improve claim accuracy, reduce billing leakage, and stabilize revenue performance.

Transforming Dermatology Revenue Cycle Performance

Dermatology billing performance depends on accurate lesion-based coding, pathology coordination, and correct classification of cosmetic versus medically necessary services. MZ Medical Billing manages the full revenue cycle with structured workflows covering eligibility checks, coding validation, pre-submission scrubbing, denial management, appeals handling, and accounts receivable tracking. Each claim is reviewed for dermatology-specific requirements, including lesion-level documentation, modifier accuracy, pathology report linkage, and payer-specific coverage rules before submission.

Comprehensive End-to-End Dermatology Billing Solutions

Our dermatology medical billing services cover the full revenue cycle: patient registration, insurance verification, CPT and ICD-10 coding, charge entry, electronic claim submission (837), payment posting (835), denial correction, appeals management, and A/R follow-up.

Each workflow is reviewed for dermatology procedures such as:

  • Skin biopsy billing (CPT 11102–11107)
  • Excision billing (CPT 11400–11646)
  • Destruction of lesions (CPT 17000–17004)
  • Mohs micrographic surgery (CPT 17311–17315)
  • Cryotherapy and in-office dermatologic procedures
  • Pathology-linked billing workflows

Claims are validated against payer edits, NCCI bundling rules, modifier usage (-25, -59), lesion site requirements, and documentation standards before submission.

Dermatology Revenue Impact and Performance Metrics

Dermatology practices working with structured billing workflows typically see:

  • 98% claim acceptance rate in optimized billing environments
  • 97% first-pass clean claims rate
  • Accounts receivable reduced to under 30 days in high-performing accounts
  • 20–30% reduction in preventable claim denials
  • 10–15% faster reimbursement cycles

These outcomes are driven by consistent coding accuracy, structured denial prevention, and complete documentation alignment across dermatology services.

Cosmetic vs Medical Dermatology Billing Risk

A significant portion of dermatology revenue depends on correct classification of cosmetic and medically necessary procedures.

Billing challenges include:

  • cosmetic procedures denied due to lack of medical necessity documentation
  • laser and aesthetic services excluded from payer coverage
  • Botox and elective treatments subject to strict payer limitations
  • frequency restrictions on repeat procedures

Clear documentation and payer policy alignment are required to avoid preventable revenue loss.

Proactive Payer and Policy Monitoring

Dermatology billing is affected by frequent changes in payer rules related to medical necessity, cosmetic exclusions, and surgical documentation requirements. MZ Medical Billing tracks updates from Medicare, Medicaid, and commercial payers and applies them directly to dermatology workflows.

This includes:

  • Cosmetic procedure coverage limitations (laser, injectables, elective procedures)
  • Prior authorization requirements for dermatologic surgery and laser services
  • Medicare LCD/NCD updates affecting biopsy and excision coverage
  • Frequency limitations for repeat dermatology procedures

Understanding Dermatology Billing Complexity and Audit Risk

Dermatology claims are frequently reviewed due to lesion-based billing structures, pathology dependencies, and cosmetic versus medical classification rules. Payers commonly review claims for NCCI edits, modifier accuracy, global surgical periods, pathology report validation, and medical necessity documentation.

Key risk areas include:

  • Missing or delayed pathology reports affecting claim completion
  • Incorrect lesion coding leading to underpayment or denial
  • Cosmetic procedures billed without sufficient medical necessity documentation
  • Modifier misuse in multi-lesion or multi-site procedures
  • Bundling conflicts under NCCI edits

Medicare, Medicaid, and commercial insurers regularly audit dermatology claims, requiring consistent documentation control and structured billing processes.

Pathology-Based Billing Workflow

Dermatology billing depends heavily on pathology coordination. Biopsy claims are often held until pathology confirmation is received, and final billing depends on accurate clinical-pathology linkage. Common workflow challenges include: delayed pathology reports affecting claim submission timing incorrect linkage between biopsy and final diagnosis coding lab coordination gaps leading to incomplete claim documentation staged billing requirements for complex cases

Pathology-Based Billing Workflow

Each dermatology practice operates with different service mixes, including medical dermatology, surgical dermatology, cosmetic services, and Mohs surgery workflows. MZ Medical Billing adjusts workflows based on specialty focus, payer mix, and procedure volume while maintaining consistent coding accuracy and denial prevention.

This includes support for:

  • medical dermatology clinics
  • surgical dermatology centers
  • cosmetic dermatology practices
  • Mohs surgery providers
  • multi-location dermatology groups

Dermatology Medical Billing Services We Provide

MZ Medical Billing Services provides full dermatology medical billing and revenue cycle management for dermatology practices across the United States. This includes medical dermatology, surgical dermatology, cosmetic dermatology, and Mohs surgery practices. We handle billing for dermatology procedures including biopsies, excisions, lesion destruction, cryotherapy, laser services, Mohs surgery, and pathology-linked services. Each claim is processed according to payer rules, coding requirements, and documentation standards before submission.

Dermatology Revenue Cycle Management (RCM)

We manage the full dermatology revenue cycle from eligibility verification to final payment posting. This includes insurance verification, charge entry, coding review, claim submission, payment posting, denial follow-up, and accounts receivable management. We also manage separation of insurance-covered services and cosmetic or self-pay services within the same encounter.

Appeals and Disputes Management

We handle dermatology claim appeals and payer disputes using clinical documentation, pathology reports, and procedure notes. Appeals are submitted for reconsideration of denied claims based on payer requirements. We manage resubmissions, reconsiderations, and formal appeal processes for dermatology services.

Denial Management

We review denied dermatology claims, correct issues, and resubmit according to payer rules. Denials are addressed based on coding errors, documentation gaps, authorization issues, and payer edits. Corrected claims are followed through until resolution or final payer determination.

Patient Billing Services (Dermatology & Self-Pay)

We manage patient billing for dermatology services including cosmetic and non-covered procedures. This includes cost estimates, patient responsibility calculation, and payment plans. We also separate cosmetic procedures from insurance claims within the same visit.

Medical Coding Services

We assign CPT, ICD-10-CM, and HCPCS codes for dermatology services including biopsies, excisions, lesion destruction, Mohs surgery, cryotherapy, and related procedures. Coding follows payer rules, NCCI edits, and modifier requirements.

Insurance Verification Services

We verify insurance coverage before dermatology procedures. This includes eligibility checks, cosmetic coverage limits, prior authorization requirements, and patient responsibility estimates.

Referral and Authorization Management

We handle prior authorizations for dermatology procedures that require payer approval. This includes submission of clinical notes, procedure details, and supporting documentation. We manage authorizations for surgical dermatology, laser procedures, and selected advanced services.

Payment Posting

We post payments from Medicare, Medicaid, and commercial payers. This includes ERA/EOB reconciliation, adjustment review, and accurate posting of dermatology claims.

Old A/R Cleanup

We review aged dermatology claims, correct issues, and resubmit eligible accounts within payer timelines.

Medical Billing Write-Off Recovery

We review written-off dermatology claims for recovery opportunities and resubmit where appropriate based on corrected documentation or coding.

Accounts Receivable (A/R) Recovery

We follow up on unpaid dermatology claims across all payers until resolution or final determination.

Claims Submission

We submit dermatology claims after final review of coding, documentation, and payer requirements for all medical, surgical, and cosmetic dermatology services.

Our Medical Billing Services

Common Billing Mistakes Costing Dermatology Practices Money

Mixing Up Cosmetic and Medical Billing

Some dermatology procedures are always cosmetic and never covered by insurance. Other procedures can be either cosmetic or medical depending on the diagnosis. Billing the wrong category to the wrong payer costs time, creates denials, and damages patient relationships.

Botox injections for wrinkles are cosmetic and insurance won’t pay. But Botox for chronic migraines, excessive sweating, or muscle spasms is medical and insurance does cover it with proper diagnosis codes. Chemical peels for anti-aging are cosmetic. Chemical peels for acne or precancerous lesions can be medical with documentation. Laser hair removal is cosmetic. Laser treatments for vascular lesions or pigmented birthmarks are medical.

When cosmetic procedures get billed to insurance, claims get denied and staff time gets wasted. When medical procedures get billed as patient-pay without checking insurance, patients get upset about unexpected bills.

Our billing team knows which procedures fall into which category. We verify insurance coverage for medical procedures before claims are submitted. We help your front desk identify cosmetic services that should be collected from patients at service time.

Not Coding Multiple Lesions in the Right Order

When you remove multiple skin lesions in one session, each lesion can be billed separately. But insurance companies reduce payment on additional procedures. The first procedure gets 100% payment. The second gets 50%. Each additional procedure gets 50%.

This payment reduction rule means the order you list procedures on the claim affects how much you get paid. The procedure with the highest payment should always be listed first. Malignant lesion removals pay more than benign lesion removals. Larger lesions pay more than smaller lesions. Different body locations have different payment rates.

If you remove three lesions in one visit and list them in wrong order, you might get paid hundreds of dollars less. Multiply this across all multiple-lesion sessions every month and the lost revenue adds up to thousands of dollars.

We review every session with multiple procedures. We identify which procedure has the highest payment value. We list procedures in payment-optimizing order on every claim. This captures maximum revenue without any coding errors.

Missing Mohs Surgery Documentation Requirements

Mohs micrographic surgery billing is different from standard excision billing. Mohs involves removing skin cancer in stages, examining each tissue layer under microscope during surgery, and reconstructing the wound. This takes hours and involves multiple steps that must all be documented and coded correctly.

Mohs surgery codes 17311-17315 cover the first stage and up to five additional stages. The number of tissue blocks processed determines which code is used. Reconstruction performed on the same day uses separate closure codes with modifier -58. Documentation must show each stage separately with tissue block counts.

Missing any of these coding elements causes underpayment. Poor documentation creates audit risk. Forgetting modifiers triggers denials. Many Mohs surgeons get underpaid simply because their billing team doesn’t understand Mohs-specific coding.

Our dermatology coders know Mohs billing completely. We review pathology reports to count tissue blocks accurately. We code reconstruction correctly with proper modifiers. We verify all documentation supports the codes billed.

Losing Money on Biologic Drug Billing

Dermatology practices administer expensive biologic drugs for psoriasis, eczema, and other chronic conditions. These drugs cost thousands of dollars per dose. Billing them wrong means either not getting paid for very expensive drugs you already purchased, or facing compliance problems.

Biologic drug billing requires two components. The administration code covers your staff’s time giving the injection or infusion. The drug code (J-code) covers the drug itself. Both must be billed correctly or payment fails.

J-codes must include correct drug name, correct units based on dose given, and the National Drug Code (NDC) number identifying the exact product. Missing NDC numbers cause automatic denials at many insurance companies. Wrong units cause underpayment or overpayment that must be refunded.

Prior authorization is almost always required before biologics are administered. Without authorization, insurance denies the entire claim and the practice loses thousands of dollars on drugs already given to the patient.

We handle all biologic drug billing including J-codes with NDC numbers, administration codes, prior authorization management, and buy-and-bill revenue tracking.

Complete Dermatology Types Billing Services We Provide

Medical Dermatology Office Visit Billing

We handle billing for all medical dermatology visits and treatments. Office visits, consultations, full body skin exams, acne treatment, eczema management, psoriasis care, rosacea treatment, and medical necessity procedures all get coded and billed accurately. We code evaluation and management visits at the correct level based on complexity and time. We apply diagnosis codes that support medical necessity for treatments performed. We verify insurance coverage before submitting claims. We track patient deductibles and copays so your front desk collects correct amounts.

Skin Biopsy and Excision Billing

All surgical procedures get coded with precise CPT codes based on lesion type, size, and location. We handle billing for shave biopsies, punch biopsies, excisional biopsies, simple closures, intermediate repairs, and complex closures. We apply correct modifiers for multiple procedures performed in the same session. We calculate payment reductions accurately. We code lesions in payment-optimizing order. We verify pathology results match billed diagnosis codes. For benign lesion excisions, we use codes 11400-11446 based on size and location. For malignant lesion excisions, we use codes 11600-11646. Proper measurement documentation must support the size codes billed. We review operative notes to verify sizes and locations match coding.

Mohs Micrographic Surgery Billing

Mohs surgery requires specialized coding knowledge. We review pathology reports to count tissue blocks. We code first stage (17311) and additional stages (17312-17315) correctly based on block counts. We bill same-day reconstruction with proper modifiers. We handle billing for complex Mohs cases involving multiple defects, extensive repairs, and flap closures. We coordinate billing when different surgeons perform different parts of the procedure. We verify all Mohs documentation meets Medicare and commercial payer requirements.

Lesion Destruction and Removal Billing

Destruction of skin lesions uses different codes than surgical excisions. We code cryotherapy, electrosurgery, curettage, laser destruction, and chemical destruction based on lesion type and number treated. For destruction of premalignant lesions like actinic keratoses, we use codes 17000-17004. For destruction of benign lesions, we use codes 17110-17111. For destruction of malignant lesions, we use codes 17260-17286. We apply first lesion and additional lesion codes correctly to capture payment for all lesions treated.

Cosmetic Dermatology Payment Collection

Cosmetic procedures don’t go through insurance. We help your practice set up clear pricing, collect payment at time of service, and track cosmetic revenue separately from medical revenue. For Botox, dermal fillers, laser skin resurfacing, chemical peels for cosmetic purposes, laser hair removal, and other aesthetic treatments, we provide pricing guidance and payment collection workflows that get your practice paid upfront. For procedures that can be medical or cosmetic depending on indication, we verify the diagnosis and help determine whether insurance billing is appropriate or patient payment should be collected.

Biologic Injection and Infusion Billing

We handle complete buy-and-bill management for dermatology biologics. This includes prior authorization before drugs are ordered, J-code billing with NDC documentation, administration code billing, and inventory tracking to match drugs purchased with drugs billed. We bill biologics for psoriasis including ustekinumab (Stelara), adalimumab (Humira), secukinumab (Cosenyx), ixekizumab (Taltz), guselkumab (Tremfya), and risankizumab (Skyrizi). We bill biologics for atopic dermatitis including dupilumab (Dupixent). We also handle corticosteroid injection billing for medical indications. Administration codes vary based on whether the drug is given by injection or infusion, and how long the infusion takes. We code administration time correctly and bill all applicable infusion hours and add-on codes.

Phototherapy and Light Treatment Billing

Light therapy for psoriasis, vitiligo, eczema, and other skin conditions uses specific phototherapy codes. We code UVB phototherapy (96900), PUVA therapy (96912), and laser phototherapy correctly. We track treatment sessions and verify medical necessity documentation supports ongoing therapy. We handle billing for in-office phototherapy equipment use and bill per session based on body area treated. We also manage prior authorization when required by insurance plans.

Allergy Patch Testing Billing

Contact dermatitis patch testing involves multiple billing components. We code patch application (95044), delayed reading (95052), and additional allergen testing correctly. Each component must be billed separately with proper sequencing. We verify the number of allergens tested matches the units billed. We make sure delayed reading codes are billed with appropriate diagnosis codes showing the reason for testing.

Prior Authorization for Dermatology Treatments

Many dermatology treatments require prior authorization before they’re covered. We handle all prior authorization requests for biologic drugs, expensive topical medications, phototherapy, and medical procedures. We submit authorization requests with complete clinical documentation including diagnosis codes, previous treatment history, treatment failure documentation, and medical necessity justification. We follow up until authorization is approved. We track authorization expiration dates and renew before treatments are interrupted.

Common Dermatology CPT Codes We Handle

Our certified dermatology coders know every code used in this specialty and apply them correctly.

Skin Biopsy Codes

11102 – Tangential biopsy of skin, single lesion

11103 – Each separate/additional lesion (add-on code)

11104 – Punch biopsy of skin, single lesion

11105 – Each separate/additional lesion (add-on code)

11106 – Incisional biopsy of skin, single lesion

11107 – Each separate/additional lesion (add-on code)

Benign Lesion Excision Codes

11400 – Excision, benign lesion, trunk/arms/legs; 0.5 cm or less

11401 – Excision, benign lesion, trunk/arms/legs; 0.6 to 1.0 cm

11402 – Excision, benign lesion, trunk/arms/legs; 1.1 to 2.0 cm

11403 – Excision, benign lesion, trunk/arms/legs; 2.1 to 3.0 cm

11404 – Excision, benign lesion, trunk/arms/legs; 3.1 to 4.0 cm

11406 – Excision, benign lesion, trunk/arms/legs; over 4.0 cm

11420 – Excision, benign lesion, scalp/neck/hands/feet/genitalia; 0.5 cm or less

11421 – Excision, benign lesion, scalp/neck/hands/feet/genitalia; 0.6 to 1.0 cm

11422 – Excision, benign lesion, scalp/neck/hands/feet/genitalia; 1.1 to 2.0 cm

11423 – Excision, benign lesion, scalp/neck/hands/feet/genitalia; 2.1 to 3.0 cm

11424 – Excision, benign lesion, scalp/neck/hands/feet/genitalia; 3.1 to 4.0 cm

11426 – Excision, benign lesion, scalp/neck/hands/feet/genitalia; over 4.0 cm

11440 – Excision, benign lesion, face/ears/eyelids/nose/lips/mucous membrane; 0.5 cm or less

11441 – Excision, benign lesion, face/ears/eyelids/nose/lips/mucous membrane; 0.6 to 1.0 cm

11442 – Excision, benign lesion, face/ears/eyelids/nose/lips/mucous membrane; 1.1 to 2.0 cm

11443 – Excision, benign lesion, face/ears/eyelids/nose/lips/mucous membrane; 2.1 to 3.0 cm

11444 – Excision, benign lesion, face/ears/eyelids/nose/lips/mucous membrane; 3.1 to 4.0 cm

11446 – Excision, benign lesion, face/ears/eyelids/nose/lips/mucous membrane; over 4.0 cm

Destruction of Lesions Codes

17000 – Destruction, premalignant lesions (actinic keratoses), first lesion

17003 – Destruction, premalignant lesions, second through 14 lesions, each

17004 – Destruction, premalignant lesions, 15 or more lesions

17110 – Destruction, benign lesions other than skin tags or cutaneous vascular lesions, up to 14 lesions

17111 – Destruction, benign lesions, 15 or more lesions

17260 – Destruction, malignant lesion, trunk/arms/legs; 0.5 cm or less

17261 – Destruction, malignant lesion, trunk/arms/legs; 0.6 to 1.0 cm

17262 – Destruction, malignant lesion, trunk/arms/legs; 1.1 to 2.0 cm

17263 – Destruction, malignant lesion, trunk/arms/legs; 2.1 to 3.0 cm

17264 – Destruction, malignant lesion, trunk/arms/legs; 3.1 to 4.0 cm

17266 – Destruction, malignant lesion, trunk/arms/legs; over 4.0 cm

17270 – Destruction, malignant lesion, scalp/neck/hands/feet/genitalia; 0.5 cm or less

17271 – Destruction, malignant lesion, scalp/neck/hands/feet/genitalia; 0.6 to 1.0 cm

17272 – Destruction, malignant lesion, scalp/neck/hands/feet/genitalia; 1.1 to 2.0 cm

17273 – Destruction, malignant lesion, scalp/neck/hands/feet/genitalia; 2.1 to 3.0 cm

17274 – Destruction, malignant lesion, scalp/neck/hands/feet/genitalia; 3.1 to 4.0 cm

17276 – Destruction, malignant lesion, scalp/neck/hands/feet/genitalia; over 4.0 cm

17280 – Destruction, malignant lesion, face/ears/eyelids/nose/lips/mucous membrane; 0.5 cm or less

17281 – Destruction, malignant lesion, face/ears/eyelids/nose/lips/mucous membrane; 0.6 to 1.0 cm

17282 – Destruction, malignant lesion, face/ears/eyelids/nose/lips/mucous membrane; 1.1 to 2.0 cm

17283 – Destruction, malignant lesion, face/ears/eyelids/nose/lips/mucous membrane; 2.1 to 3.0 cm

17284 – Destruction, malignant lesion, face/ears/eyelids/nose/lips/mucous membrane; 3.1 to 4.0 cm

17286 – Destruction, malignant lesion, face/ears/eyelids/nose/lips/mucous membrane; over 4.0 cm

Biologic Injection and Infusion Codes

96372 – Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); subcutaneous or intramuscular

96365 – Intravenous infusion, for therapy, prophylaxis, or diagnosis; initial, up to 1 hour

96366 – Each additional hour

96367 – Additional sequential infusion of a new drug/substance, up to 1 hour

96368 – Concurrent infusion

Mohs Micrographic Surgery Codes

17311 – Mohs micrographic technique, including removal of all gross tumor, surgical excision of tissue specimens, mapping, color coding of specimens, microscopic examination of specimens by the surgeon, and histopathologic preparation including routine stain(s), head, neck, hands, feet, genitalia, or any location with surgery directly involving muscle, cartilage, bone, tendon, major nerves, or vessels; first stage, up to 5 tissue blocks

17312 – Each additional stage after the first stage, up to 5 tissue blocks

17313 – Mohs micrographic technique, first stage, 6 to 10 tissue blocks

17314 – Each additional stage after the first stage, 6 to 10 tissue blocks

17315 – Mohs micrographic technique, each additional block after the first 10 tissue blocks, any stage

Nail Procedure Codes

11719 – Trimming of nondystrophic nails, any number

11720 – Debridement of nail(s) by any method; 1 to 5

11721 – Debridement of nail(s) by any method; 6 or more

11730 – Avulsion of nail plate, partial or complete, simple; single

11732 – Avulsion of nail plate, each additional nail plate

11750 – Excision of nail and nail matrix, partial or complete

11755 – Biopsy of nail unit

11760 – Repair of nail bed

11762 – Reconstruction of nail bed with graft

11765 – Wedge excision of skin of nail fold

Phototherapy Codes

96900 – Actinotherapy (ultraviolet light)

96910 – Photochemotherapy; tar and ultraviolet B (Goeckerman treatment) or petrolatum and ultraviolet B

96912 – Photochemotherapy; psoralens and ultraviolet A (PUVA)

96913 – Photochemotherapy (Goeckerman and/or PUVA) for severe photoresponsive dermatoses requiring at least 4-8 hours of care under direct supervision of the physician

96920 – Laser treatment for inflammatory skin disease; total area less than 250 sq cm

96921 – Laser treatment for inflammatory skin disease; 250 sq cm to 500 sq cm

96922 – Laser treatment for inflammatory skin disease; over 500 sq cm

Common Dermatology J-Codes for Biologics

J0135 – Adalimumab injection, 20 mg

J1438 – Etanercept injection, 25 mg

J1745 – Infliximab injection, 10 mg

J2323 – Natalizumab injection, 1 mg

J3262 – Tocilizumab injection, 1 mg

J3590 – Unclassified biologics

We stay current with all CPT code updates, new biologic drug codes, and dermatology-specific billing requirements so your practice always gets paid correctly.

Malignant Lesion Excision Codes

11600 – Excision, malignant lesion, trunk/arms/legs; 0.5 cm or less

11601 – Excision, malignant lesion, trunk/arms/legs; 0.6 to 1.0 cm

11602 – Excision, malignant lesion, trunk/arms/legs; 1.1 to 2.0 cm

11603 – Excision, malignant lesion, trunk/arms/legs; 2.1 to 3.0 cm

11604 – Excision, malignant lesion, trunk/arms/legs; 3.1 to 4.0 cm

11606 – Excision, malignant lesion, trunk/arms/legs; over 4.0 cm

11620 – Excision, malignant lesion, scalp/neck/hands/feet/genitalia; 0.5 cm or less

11621 – Excision, malignant lesion, scalp/neck/hands/feet/genitalia; 0.6 to 1.0 cm

11622 – Excision, malignant lesion, scalp/neck/hands/feet/genitalia; 1.1 to 2.0 cm

11623 – Excision, malignant lesion, scalp/neck/hands/feet/genitalia; 2.1 to 3.0 cm

11624 – Excision, malignant lesion, scalp/neck/hands/feet/genitalia; 3.1 to 4.0 cm

11626 – Excision, malignant lesion, scalp/neck/hands/feet/genitalia; over 4.0 cm

11640 – Excision, malignant lesion, face/ears/eyelids/nose/lips; 0.5 cm or less

11641 – Excision, malignant lesion, face/ears/eyelids/nose/lips; 0.6 to 1.0 cm

11642 – Excision, malignant lesion, face/ears/eyelids/nose/lips; 1.1 to 2.0 cm

11643 – Excision, malignant lesion, face/ears/eyelids/nose/lips; 2.1 to 3.0 cm

11644 – Excision, malignant lesion, face/ears/eyelids/nose/lips; 3.1 to 4.0 cm

11646 – Excision, malignant lesion, face/ears/eyelids/nose/lips; over 4.0 cm

Why Dermatology Practices Choose Our Billing Services

We Know Dermatology Coding Rules That General Billers Miss

General medical billing companies handle many specialties but don't have deep expertise in any single specialty. They miss dermatology-specific coding rules like Mohs tissue block counting, multiple lesion sequencing, and biologic drug billing with NDC requirements. Our team focuses specifically on dermatology billing. We know the specialty codes, the modifier rules, the documentation requirements, and the payer policies that apply to dermatology practices. This focused expertise means fewer denials and more revenue.

We Track Prior Authorizations So Expensive Treatments Don't Get Denied

Biologic drugs cost thousands of dollars per dose. When prior authorization is missing, insurance denies the claim and your practice loses money on drugs already given to the patient. We track every authorization request, every approval, every expiration date, and every renewal. Treatments never get interrupted or denied because of expired authorizations

We Separate Cosmetic Revenue From Medical Revenue Properly

Dermatology practices that mix cosmetic and medical billing create problems for themselves. Insurance claims for cosmetic procedures waste time and damage credibility with payers. Patients receiving unexpected bills for procedures they thought insurance covered damage patient relationships. We set up clear separation between cosmetic and medical services. Cosmetic services are priced clearly and collected upfront. Medical services are verified for coverage and billed to insurance. Your revenue stays organized and both patients and insurance companies are handled correctly.

We Provide Clear Monthly Reports You Can Actually Understand

Your monthly reports show collections by provider, collections by procedure type, denial rates by payer, top denial reasons, accounts receivable aging, and revenue trends. All written in plain language without billing jargon. You see exactly how your practice is performing financially and where opportunities exist to improve.

Medical Billing for Dermatology and Related Specialties

Our dermatology billing team handles all dermatology service types and related specialties. From routine skin exams and acne treatment to Mohs surgery, biologic injections, and cosmetic procedures, we make sure every service is billed correctly.

We also support related practices including plastic surgery offices, medical spas operating within medical practices, allergy and immunology practices, rheumatology practices using biologic drugs, and primary care practices offering dermatology services. Every practice gets billing expertise matched to their services.

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Dermatology Billing Services for Practices Across All 50 States

MZ Medical Billing LLC provides dermatology medical billing and Revenue Cycle Management services to dermatology practices across the United States. We support solo dermatologists, multi-provider dermatology groups, Mohs surgery specialists, cosmetic dermatology practices, and medical-cosmetic combination practices.

Our AAPC-certified dermatology billing specialists handle CPT and ICD-10 coding for all dermatology procedures, medical and cosmetic service separation, Mohs surgery billing, biologic drug billing with J-codes and NDC documentation, prior authorization management, denial management, and full accounts receivable recovery. We work with Medicare, Medicaid, commercial payers, and cash-pay cosmetic patients.

With MZ Medical Billing LLC, dermatology practices get accurate claim submissions, faster payments, and full compliance with all payer billing rules. Your clinical team focuses on treating skin conditions while we focus on making sure every service gets paid correctly.

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Your Dermatology Practice Deserves Better Billing

Skin cancer removals, biologic injections, Mohs surgery, and chronic disease management are high-value services. When billing mistakes happen, your practice loses significant money on every procedure performed.

If multiple procedure coding errors, missed prior authorizations, or cosmetic-medical billing confusion are costing your practice money right now, those problems will not fix themselves. Every month they continue is another month of revenue your practice should have collected but didn’t.

Let MZ Medical Billing LLC take over your dermatology billing. We find the revenue gaps, fix the billing problems, and build a billing process that collects everything your practice has earned.

Contact us for a free billing analysis. We will review your recent claims, identify where revenue is being lost, and show you exactly how much more your practice should be collecting.

Contact us now
FAQS

Frequently Asked Questions

How do you determine which procedures are cosmetic versus medical?

The diagnosis and indication determine whether a procedure is cosmetic or medical. Botox for wrinkles is cosmetic. Botox for chronic migraines with proper diagnosis code is medical. Chemical peels for anti-aging are cosmetic. Chemical peels for actinic keratoses or acne scarring can be medical with proper documentation. Laser treatments for hair removal or skin rejuvenation are cosmetic. Laser treatments for vascular malformations or pigmented lesions are medical. We review the diagnosis documented in the chart and verify it supports medical necessity before billing insurance. For borderline cases, we discuss with your clinical team before determining the billing approach.

How does the multiple procedure payment reduction work for lesion excisions?

When multiple surgical procedures are performed in the same session, Medicare and most commercial payers reduce payment on additional procedures. The highest-paying procedure receives 100% of its fee schedule amount. The second procedure receives 50%. The third through fifth procedures each receive 50%. The sixth and beyond each receive 50%. This reduction applies automatically based on the relative value units of each code. The order procedures are listed on the claim determines which procedure is considered primary and which are considered add-on. We list procedures in order of highest payment to lowest payment to maximize total reimbursement.

What documentation is required for Mohs surgery billing?

Mohs surgery documentation must include a detailed operative report showing each stage performed, the number of tissue blocks taken and examined at each stage, the size and location of the defect after tumor removal, and the method of repair. The pathology slides must be examined by the surgeon performing the procedure during the surgery. Documentation must clearly show stages were performed sequentially on the same day until clear margins were achieved. Reconstruction codes require separate documentation of the closure technique, layers closed, and complexity of repair. Missing any of these elements can cause claim denials or underpayment.

How do you handle billing when both a dermatologist and plastic surgeon are involved in Mohs surgery?

When a dermatologist performs Mohs tumor removal and a plastic surgeon performs reconstruction on the same day, the dermatologist bills the Mohs codes (17311-17315) without modifier. The plastic surgeon bills the appropriate closure or reconstruction code with modifier -78 to indicate a related procedure during the global period. If reconstruction happens on a different day than Mohs surgery, the plastic surgeon uses modifier -58 for staged procedure. Both providers must have proper documentation and both claims must reference the same diagnosis. We coordinate between providers when necessary to prevent claim conflicts.

What is an NDC number and why is it required on biologic drug claims?

A National Drug Code (NDC) number is an 11-digit identifier that specifies the exact drug product, manufacturer, and package size. Most commercial payers and Medicare Advantage plans require NDC numbers on J-code drug claims to verify the specific product administered. Without the correct NDC, drug claims are rejected automatically. NDC numbers must be formatted correctly on claims with proper units and qualifier codes. We maintain current NDC databases for all dermatology biologics and include correct NDC information on every drug claim we submit.

How do you optimize coding when multiple lesions are excised in one visit?

We review the operative note to identify the diagnosis, size, and location of each lesion removed. Malignant lesion codes pay more than benign lesion codes at the same size and location. Facial lesions pay more than trunk lesions. Larger lesions pay more than smaller lesions. We list the highest-paying lesion first on the claim, followed by the second-highest-paying lesion, and so on. This ordering maximizes payment under the multiple procedure reduction rules. We also verify that lesion sizes documented in the operative note support the size-based codes billed and that pathology results match the diagnoses billed.

What prior authorization is typically required for dermatology biologics?

Most commercial insurance plans and Medicare Advantage plans require prior authorization before biologic drugs for psoriasis or atopic dermatitis are covered. Authorization requests require diagnosis codes, duration of condition, severity measurements (PASI scores, BSA involvement, or similar), documentation of previous systemic treatment failures, and treatment plan with dosing schedule. Different payers have different requirements for which medications must be tried and failed before they approve specific biologics. We know each payer’s step therapy requirements and submit complete authorization packages that get approved the first time.

How do you bill for full body skin exams?

Full body skin exams are billed using evaluation and management codes based on whether the patient is new or established and the complexity of the exam. A screening skin exam in an asymptomatic patient uses preventive medicine codes (99381-99397 for new patients, 99391-99397 for established patients). A skin exam for a patient with history of skin cancer or concerning symptoms uses regular E/M codes (99202-99215). If lesions are biopsied or treated during the exam, those procedures are billed separately with modifier -25 on the E/M code to indicate a significant separately identifiable service. The diagnosis codes must support the level of service billed and the medical necessity for any procedures performed.

Can dermatology practices bill for both an E/M visit and procedures on the same day?

Yes, when a significant separately identifiable evaluation and management service is performed in addition to a procedure, both can be billed with modifier -25 appended to the E/M code. The E/M service must be above and beyond the usual pre-procedure and post-procedure work. For example, if a patient comes in for evaluation of a rash and during that visit the dermatologist also freezes an actinic keratosis, both the E/M visit and the destruction code can be billed. However, simply examining a lesion before deciding to remove it doesn’t support a separate E/M. The documentation must clearly show the separate service that justifies billing both codes.

How quickly can you identify revenue problems in our current dermatology billing?

We begin with a billing analysis that reviews recent claims, identifies coding patterns, and compares denial rates by service type and payer. We look at how multiple lesions are sequenced, whether Mohs surgery is coded correctly, whether biologics are billed with proper J-codes and NDC numbers, and whether cosmetic versus medical billing is separated properly. Within the first month, we identify specific areas where your practice is losing revenue and begin fixing them immediately.

Having billing issues? Let’s fix what’s affecting your revenue

Book a free 15-minute call to review your billing problems and identify missed revenue

Having billing issues? Let’s fix what’s affecting your revenue

Book a free 15-minute call to review your billing problems and identify missed revenue