Malignant neoplasm of anus and anal canal (C21)

ICD-10 Index
- Neoplasms (C00–D48)
  - Malignant neoplasms of digestive organs (C15-C26)
    - - C21 - Malignant neoplasm of anus and anal canal NON-BILLABLE CODE
      - C21.0 - Malignant neoplasm of anus, unspecified BILLABLE CODE
      - C21.1 - Malignant neoplasm of anal canal BILLABLE CODE
      - C21.2 - Malignant neoplasm of cloacogenic zone BILLABLE CODE
      - C21.8 - Malig neoplasm of ovrlp sites of rectum, anus and anal canal BILLABLE CODE

Instructional Notations

Type 2 Excludes Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

malignant carcinoid tumors of the colon C7A.02
malignant melanoma of anal margin C43.51
malignant melanoma of anal skin C43.51
malignant melanoma of perianal skin C43.51
other and unspecified malignant neoplasm of anal margin C44.500 C44.510 C44.520 C44.590
other and unspecified malignant neoplasm of anal skin C44.500 C44.510 C44.520 C44.590
other and unspecified malignant neoplasm of perianal skin C44.500 C44.510 C44.520 C44.590