C21 — ICD-10-CM Diagnosis Codes
- C21 Malignant neoplasm of anus and anal canal
- C21.0 Malignant neoplasm of anus, unspecified billable
- C21.1 Malignant neoplasm of anal canal billable
- C21.2 Malignant neoplasm of cloacogenic zone billable
- C21.8 Malignant neoplasm of overlapping sites of rectum, anus and anal canal billable