ICD-10-CM > C00-D49 > D00-D09 > D01 > D01.4 D01.4 Carcinoma in situ of other and unspecified parts of intestine Non-Billable/Non-Specific Type 1 Excludes carcinoma in situ of ampulla of Vater (D01.5) Codes D01.40Carcinoma in situ of unspecified part of intestineD01.49Carcinoma in situ of other parts of intestine