C44.590 — Other specified malignant neoplasm of anal skin
C44.590 is a billable, specific ICD-10-CM code for other specified malignant neoplasm of anal skin. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Other specified malignant neoplasm of anal margin
- Other specified malignant neoplasm of perianal skin
Risk adjustment
C44.590 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
C44.590 is named in 59 Medicare coverage policies — 59 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
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How C44.590 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to C44.590.
- Paget's disease›extramammary›anus›margin
- Paget's disease›extramammary›anus›skin
Related codes at this level
Codes that share C44.59. If C44.590 is not quite right, the correct code is usually one of these.
Questions about C44.590
- Is C44.590 a billable ICD-10-CM code?
- Yes. C44.590 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does C44.590 sit in the tabular list?
- Neoplasms (C00-D49), in the block Melanoma and other malignant neoplasms of skin (C43-C44).