C21.8 MALIG NEOPLASM OF OVRLP SITES OF RECTUM, ANUS AND ANAL CANAL

Code Information

Diagnosis Code: C21.8

Short Description: Malig neoplasm of ovrlp sites of rectum, anus and anal canal

Long Description: Malignant neoplasm of overlapping sites of rectum, anus and anal canal

Code Classification:

  • Neoplasms (C00–D48)
    • Malignant neoplasms of digestive organs (C15-C26)
      • Malignant neoplasm of anus and anal canal (C21)
        • C21.8 Malig neoplasm of ovrlp sites of rectum, anus and anal canal

Code Version: 2017 ICD-10-CM

Diagnostic Related Group(s)

The code C21.8 is grouped in the following Diagnostic Related Group(s) (MS-DRG v34.0)
  • Digestive Malignancy With Mcc (374)
  • Digestive Malignancy With Cc (375)
  • Digestive Malignancy Without Cc/mcc (376)

References to Index of Diseases and Injuries

The code C21.8 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Inclusion Terms:
    • Malignant neoplasm of anorectal junction
    • Malignant neoplasm of anorectum
    • Primary malignant neoplasm of two or more contiguous sites of rectum, anus and anal canal

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
C21.8 Right Arrow 154.8 Mal neo rectum/anus NEC
This ICD-10 to ICD-9 data is based on the 2015 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

No. ICD-10 Code ICD-10 Description
1 C21 Malignant neoplasm of anus and anal canal
2 C21.0 Malignant neoplasm of anus, unspecified
3 C21.1 Malignant neoplasm of anal canal
4 C21.2 Malignant neoplasm of cloacogenic zone



This page was last updated on: 1/1/2018