C20 Malignant neoplasm of rectum

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Malignant neoplasm of rectal ampulla

Excludes1 (never code together)

• malignant carcinoid tumor of the rectum (C7A.026)

Applies from C20 Malignant neoplasm of rectum

Applicable to

• Malignant neoplasm of rectal ampulla

Excludes1 (never code together)

• malignant carcinoid tumor of the rectum (C7A.026)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 22 — Bladder, Colorectal, and Other Cancers
• CMS-HCC V22: HCC 11 — Colorectal, Bladder, and Other Cancers
• ESRD V24: HCC 11

MS-DRG index

Defines the logic of DRG(s) 374-376 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 154.1 Malignant neoplasm of rectum

Nearby codes

• C20 Malignant neoplasm of rectum (this code)