Category C21
Non-Billable Category
FY2027 Dataset
C21: Malignant neoplasm of anus and anal canal
Parent Chapter: Chapter 2: Neoplasms
Notice on Coding Specificity: Category C21 is a 3-character heading and cannot be reported directly on healthcare claims. You must assign one of the specific child codes listed below.
Specific Child Codes in Category C21
| Code | Official Descriptor | Status | Action |
|---|---|---|---|
| C21.0 | Malignant neoplasm of anus, unspecified | Billable Code | View Code |
| C21.1 | Malignant neoplasm of anal canal | Billable Code | View Code |
| C21.2 | Malignant neoplasm of cloacogenic zone | Billable Code | View Code |
| C21.8 | Malig neoplasm of ovrlp sites of rectum, anus and anal canal | Billable Code | View Code |
| C21 | Malignant neoplasm of anus and anal canal | Non-Billable | View Code |