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C21Malignant neoplasm of anus and anal canal

ICD-10-CM category (non-billable header) code — part of Malignant neoplasms of digestive organs (C15-C26)

Code Details

BillableNo — use a more specific child code
ChapterChapter 2: Neoplasms (C00-D49)
SectionMalignant neoplasms of digestive organs (C15-C26)

Coding Notes

Excludes2 (not part of this condition — may code both)

  • malignant carcinoid tumors of the colon (C7A.02-)
  • malignant melanoma of anal margin (C43.51)
  • malignant melanoma of anal skin (C43.51)
  • malignant melanoma of perianal skin (C43.51)
  • other and unspecified malignant neoplasm of anal margin (C44.500, C44.510, C44.520, C44.590)
  • other and unspecified malignant neoplasm of anal skin (C44.500, C44.510, C44.520, C44.590)
  • other and unspecified malignant neoplasm of perianal skin (C44.500, C44.510, C44.520, C44.590)

Subcategories (4)

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