C21.0 MALIGNANT NEOPLASM OF ANUS, UNSPECIFIED

Code Information

Diagnosis Code: C21.0

Short Description: Malignant neoplasm of anus, unspecified

Long Description: Malignant neoplasm of anus, unspecified

Code Classification:

  • Neoplasms (C00–D48)
    • Malignant neoplasms of digestive organs (C15-C26)
      • Malignant neoplasm of anus and anal canal (C21)
        • C21.0 Malignant neoplasm of anus, unspecified

Code Version: 2017 ICD-10-CM

Diagnostic Related Group(s)

The code C21.0 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)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
C21.0 Right Arrow 154.3 Malignant neo anus NOS
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 C21.1 Malignant neoplasm of anal canal
3 C21.2 Malignant neoplasm of cloacogenic zone
4 C21.8 Malignant neoplasm of overlapping sites of rectum, anus and anal canal



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