D01.4Carcinoma in situ of other and unspecified parts of intestine

D01.4 is the ICD-10-CM diagnosis code for carcinoma in situ of other and unspecified parts of intestine. It belongs to category D01 (carcinoma in situ of other and unspecified digestive organs), block D00-D09 (in situ neoplasms) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within D01, choose D01.4 (other and unspecified parts of intestine) only when documentation doesn't support a more specific option: colon (D01.0), rectosigmoid junction (D01.1), rectum (D01.2), anus and anal canal (D01.3), liver, gallbladder and bile ducts (D01.5), other specified digestive organs (D01.7) and digestive organ, unspecified (D01.9).

To report this condition, pick the subcode that matches the documentation: D01.40 (intestine) and D01.49 (intestine).

Don't report D01.4 together with the conditions in its Excludes1 note: carcinoma in situ of ampulla of Vater (D01.5).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.