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D04.20

D04.20: Carcinoma in situ of skin of unspecified ear and external auricular canal

Billable / specific codeICD-10-CMunspecified

D04.20 is a billable, specific ICD-10-CM code for carcinoma in situ of skin of unspecified ear and external auricular canal. It is valid for submission on a claim.

Check D04.20 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above D04.20

A category’s note binds every code beneath it.

Written on D04: Carcinoma in situ of skin

  • erythroplasia of Queyrat (penis) NOS (D07.4)
  • melanoma in situ (D03.-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

D04.20 is named in 8 Medicare coverage policies: 8 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56748Billing and Coding: White Cell Colony Stimulating Factors
  • A57638Billing and Coding: Destruction of Malignant Skin Lesions
  • A57660Billing and Coding: Excision of Malignant Skin Lesions
  • A57767Billing and Coding: Mohs Micrographic Surgery (MMS)

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under D04.2

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.