Dermatology ICD-10 Codes & CPT Codes

Dermatology billing encompasses a broad range of diagnosis and procedure codes covering skin conditions, neoplasms, biopsies, and destruction procedures. This reference lists the top ICD-10-CM and CPT codes used by dermatologists and dermatopathologists in the United States.

FY 2026 ICD-10-CM (CMS) · CPT codes updated annually · All codes verified billable

Top ICD-10 Codes for Dermatology

ICD-10 Code Description Billable
L70.0 Acne vulgaris ✓
L40.0 Psoriasis vulgaris ✓
L20.9 Atopic dermatitis, unspecified ✓
L30.9 Dermatitis, unspecified ✓
L57.0 Actinic keratosis ✓
C44.91 Unspecified malignant neoplasm of skin, unspecified ✓
D23.9 Other benign neoplasm of skin, unspecified ✓
L60.0 Ingrowing nail ✓
L68.0 Hirsutism ✓
B35.1 Tinea unguium (onychomycosis) ✓
L63.9 Alopecia areata, unspecified ✓
L50.9 Urticaria, unspecified ✓
L73.9 Follicular disorder, unspecified ✓
L84 Corns and callosities ✓
L98.9 Disorder of skin and subcutaneous tissue, unspecified ✓

Source: CMS ICD-10-CM Official Code Set FY 2026

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Common CPT Codes for Dermatology Billing

CPT Code Description
11100 Biopsy of skin, subcutaneous tissue and/or mucous membrane; single lesion
17000 Destruction (eg, laser surgery, electrosurgery) of premalignant lesion; first lesion
17110 Destruction of flat warts, molluscum contagiosum, or milia; up to 14 lesions
11305 Shaving of epidermal or dermal lesion, single lesion, scalp, neck, or trunk
99213 Office visit, established patient, low complexity
99214 Office visit, established patient, moderate complexity

CPT descriptions are editorial summaries. Refer to the CMS Physician Fee Schedule for official rates.

Dermatology Billing & Coding Tips

  • Destruction codes (17000–17286) are quantity-based — code 17000 for the first lesion, 17003 for each additional 2–14, and 17004 for 15+ lesions.
  • Biopsy code 11100 covers the first lesion; add 11101 for each additional lesion biopsied at the same session.
  • Document whether a neoplasm is benign, malignant, or uncertain behavior before coding from Chapter 2 of ICD-10.
  • Specify the body site and type for acne (L70.0–L70.9) and psoriasis (L40.0–L40.9) rather than using the unspecified code.

Frequently Asked Questions

What is the ICD-10 code for eczema?

L20.9 covers Atopic dermatitis (eczema), unspecified. For contact dermatitis, use L25.9. Always specify the type of dermatitis when documented to avoid down-coding.

What CPT code is used for skin biopsy?

11100 is used for the first skin biopsy. Add-on code 11101 is billed for each additional lesion biopsied at the same encounter. Both require a separate pathology code when tissue is sent for analysis.

Is actinic keratosis L57.0 a cancer code?

No. L57.0 is a premalignant (not malignant) code and falls under skin disorders due to chronic exposure to nonionizing radiation. If progression to squamous cell carcinoma is documented, code from the C44 category instead.

How are destruction codes counted?

17000 is the first lesion. 17003 is each additional lesion up to 14 (used with 17000). For 15 or more lesions in one session, bill 17004 as a standalone code instead.

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OmniMD’s Dermatology EHR includes body mapping tools, lesion tracking, and integrated procedure-code selection linked to your documentation, reducing coding time and audit exposure.

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