D01.1 Carcinoma in situ of rectosigmoid junction

Billable ICD-10-CM code, FY2026.

Applies from D01 Carcinoma in situ of other and unspecified digestive organs

Excludes1 (never code together)

• melanoma in situ (D03.-)

MS-DRG index

Defines the logic of DRG(s) 374-376 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 230.4 Carcinoma in situ of rectum (approximate)

Code annotations containing back-references to D01.1

Back-references to D01.1

• Type 1 Excludes: D01.0 Carcinoma in situ of colon ("carcinoma in situ of rectosigmoid junction (D01.1)")

Nearby codes

• D01 Carcinoma in situ of other and unspecified digestive organs
• D01.0 Carcinoma in situ of colon
• D01.1 Carcinoma in situ of rectosigmoid junction (this code)
• D01.2 Carcinoma in situ of rectum
• D01.3 Carcinoma in situ of anus and anal canal
• D01.4 Carcinoma in situ of other and unspecified parts of intestine
• D01.40 Carcinoma in situ of unspecified part of intestine
• D01.49 Carcinoma in situ of other parts of intestine