D01.3
ICD-10BillableCarcinoma in situ of anus and anal canal
Official ICD-10-CM descriptor (FY2026)
Carcinoma in situ of anus and anal canal
D01.3 is valid for submission on a claim — CMS flags it as a billable, specific code.
Inclusion terms
- Anal intraepithelial neoplasia III [AIN III]
- Severe dysplasia of anus
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- anal intraepithelial neoplasia I and II [AIN I and AIN II] (K62.82)
- carcinoma in situ of anal margin (D04.5)
- carcinoma in situ of anal skin (D04.5)
- carcinoma in situ of perianal skin (D04.5)
Related codes in D01
- D01.0Carcinoma in situ of colon
- D01.1Carcinoma in situ of rectosigmoid junction
- D01.2Carcinoma in situ of rectum
- D01.4Carcinoma in situ of other and unsp parts of intestinecategory
- 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
Where this code sits
- Chapter
- 2. Neoplasms (C00-D49)
- Parent code
- D01
Krasyn AI Coder
Get code suggestions automatically as you type notes. Free for 50 analyses.
Install for Chrome — freeSource
ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.