C21

Non-Billable

Malignant neoplasm of anus and anal canal

C21 should not be used for reimbursement purposes as there are multiple sub-diagnoses that fall under this code. Please refer to the sub-diagnoses below.

Related Diagnoses

  • C21.0Malignant neoplasm of anus, unspecified
  • C21.1Malignant neoplasm of anal canal
  • C21.2Malignant neoplasm of cloacogenic zone
  • C21.8Malignant neoplasm of overlapping sites of rectum, anus and anal canal
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