C21 Malignant neoplasm of anus and anal canal
ICD-10-CM category C21 sits in Chapter 2 (Neoplasms, C00-D49). It contains 4 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Billable codes in C21
| Code | Description |
|---|---|
C21.0 | Malignant neoplasm of anus, unspecified |
C21.1 | Malignant neoplasm of anal canal |
C21.2 | Malignant neoplasm of cloacogenic zone |
C21.8 | Malignant neoplasm of overlapping sites of rectum, anus and anal canal |
Search within ICD-10-CM for C21 and related codes
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