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

Billable ICD-10-CM code, FY2026.

Applies from D04 Carcinoma in situ of skin

Excludes1 (never code together)

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

MS-DRG index

Defines the logic of DRG(s) 606-607 in MDC 09.

Approximate ICD-9-CM (GEMs)

• 232.2 Carcinoma in situ of skin of ear and external auditory canal (approximate)

Code annotations containing back-references to D04.20

Back-references to D04.2

• Type 1 Excludes: D02.3 Carcinoma in situ of other parts of respiratory system ("carcinoma in situ of ear (external) (skin) (D04.2-)")

Nearby codes

• D04.112 Carcinoma in situ of skin of right lower eyelid, including canthus
• D04.12 Carcinoma in situ of skin of left eyelid, including canthus
• D04.121 Carcinoma in situ of skin of left upper eyelid, including canthus
• D04.122 Carcinoma in situ of skin of left lower eyelid, including canthus
• D04.2 Carcinoma in situ of skin of ear and external auricular canal
• D04.20 Carcinoma in situ of skin of unspecified ear and external auricular canal (this code)
• D04.21 Carcinoma in situ of skin of right ear and external auricular canal
• D04.22 Carcinoma in situ of skin of left ear and external auricular canal
• D04.3 Carcinoma in situ of skin of other and unspecified parts of face
• D04.30 Carcinoma in situ of skin of unspecified part of face
• D04.39 Carcinoma in situ of skin of other parts of face