Dermatology Coding & Billing Hub

Clinical coding rules for benign and malignant lesion destruction, biopsies, excisions, repairs, and Mohs micrographic surgery.

Top Diagnoses: 6 Core Codes

Top Procedures: 6 Core Procedures

Auditing Focus: High Priority

Data Source: CMS & Clinical Society Guidelines

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Core Specialty Coding Directive

What are the critical billing rules for Dermatology Coding & Billing Hub? Excision measurements must include the greatest lesion diameter plus the narrowest margins multiplied by two. Never bill intermediate repair with simple biopsy.

Updated for current Medicare Part B coverage policies and NCCI quarterly edit tables.

Frequently Billed ICD-10-CM Diagnosis Codes

Click any diagnosis code to view complete CDC tabular guidelines, Excludes 1 exclusions, and billability status:

                        L70.0 →
                    

Acne vulgaris

                        L40.0 →
                    

Psoriasis vulgaris

                        C44.319 →
                    

Basal cell carcinoma of skin of other parts of face

                        D22.9 →
                    

Melanocytic nevi, unspecified

                        L82.1 →
                    

Other seborrheic keratosis

                        L57.0 →
                    

Actinic keratosis

Common CPT & HCPCS Procedure Codes

Code	Description	Reimbursement Bridge
11102	Specialty procedure or diagnostic service	Standard PFS Code
11104	Specialty procedure or diagnostic service	Standard PFS Code
11402	Specialty procedure or diagnostic service	Standard PFS Code
11602	Specialty procedure or diagnostic service	Standard PFS Code
17000	Specialty procedure or diagnostic service	Standard PFS Code
17311	Specialty procedure or diagnostic service	Standard PFS Code

Essential Billing Modifiers for Dermatology Coding & Billing Hub

Modifier 25 Guidelines → Modifier 59 Guidelines → Modifier XS Guidelines → Modifier 51 Guidelines →

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High-Risk Documentation & Audit Traps

Excision measurements must include the greatest lesion diameter plus the narrowest margins multiplied by two. Never bill intermediate repair with simple biopsy.

Audit Defense Recommendation: Medical records must contain explicit physician-authored clinical notes demonstrating medical necessity. Review NCCI PTP edits prior to submission using our free NCCI Edit Checker.

AAPC CPC Exam Focus

Certification Exam Key Concepts

CPC exam routinely includes Mohs surgery stage and tissue block calculations, complex flap repairs, and distinguishing tangential vs punch biopsies.

Practice With Free Coding Tools →