Emergency: 119
AMDA-IMIC

C20 Malignant neoplasm of rectum

Billable

Block: Malignant neoplasms of digestive organs (C15-C26)

Includes

  • Malignant neoplasm of rectal ampulla

Excludes 1 (cannot be coded together)

  • malignant carcinoid tumor of the rectum (C7A.026)
✓
This category is a complete, billable diagnosis code.

No additional specificity is required — submit C20 directly on claims and documentation without a subcode extension.

Last reviewed: September 2026