Diagnosis Code

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

The code C21.0 is VALID for claim submission

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: 2018 ICD-10-CM

Synonyms

  • Adenocarcinoma of anorectum
  • Adenocarcinoma of anus
  • Malignant epithelial neoplasm of anus
  • Malignant neoplasm of rectum, rectosigmoid junction and anus
  • Malignant tumor of anus
  • Malignant tumor of anus and anal canal
  • Primary adenocarcinoma of anus
  • Primary malignant neoplasm of anus

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 2018 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

ICD-10 Code ICD-10 Description
C21 Malignant neoplasm of anus and anal canal
C21.1 Malignant neoplasm of anal canal
C21.2 Malignant neoplasm of cloacogenic zone
C21.8 Malignant neoplasm of overlapping sites of rectum, anus and anal canal

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