D01.1 — Carcinoma in situ of rectosigmoid junction
D01.1 is a billable, specific ICD-10-CM code for carcinoma in situ of rectosigmoid junction. It is valid for submission on a claim.
Other codes that can never be billed with D01.1
These codes carry an Excludes1 note pointing at D01.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading D01.1 alone.
- D01.0Carcinoma in situ of colon
Risk adjustment
D01.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
D01.1 is named in 23 Medicare coverage policies — 23 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52480Oral Antiemetic Drugs (Replacement for Intravenous Antiemetics) - Policy Article
- A54768Billing and Coding: Cardiac Blood Pool Imaging (Multiple Gated Acquisition Scanning- MUGA, Ventriculography) When Performed in Conjunction with Cardiotoxic Chemotherapy
- A55937Billing and Coding: Diagnostic Colonoscopy
- A56394Billing and Coding: Colonoscopy and Sigmoidoscopy-Diagnostic
Related codes at this level
Codes that share D01. If D01.1 is not quite right, the correct code is usually one of these.
- D01.0Carcinoma in situ of colon
- D01.2Carcinoma in situ of rectum
- D01.3Carcinoma in situ of anus and anal canal
- D01.4Carcinoma in situ of other and unspecified parts of intestine
- D01.5Carcinoma in situ of liver, gallbladder and bile ducts
- D01.7Carcinoma in situ of other specified digestive organs
- D01.9Carcinoma in situ of digestive organ, unspecified
Questions about D01.1
- Is D01.1 a billable ICD-10-CM code?
- Yes. D01.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does D01.1 sit in the tabular list?
- Neoplasms (C00-D49), in the block In situ neoplasms (D00-D09).