C44.591 — Other specified malignant neoplasm of skin of breast
C44.591 is a billable, specific ICD-10-CM code for other specified malignant neoplasm of skin of breast. It is valid for submission on a claim.
Other codes that can never be billed with C44.591
These codes carry an Excludes1 note pointing at C44.591. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C44.591 alone.
- C50Malignant neoplasm of breast
Risk adjustment
C44.591 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
C44.591 is named in 63 Medicare coverage policies — 63 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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Related codes at this level
Codes that share C44.59. If C44.591 is not quite right, the correct code is usually one of these.
Questions about C44.591
- Is C44.591 a billable ICD-10-CM code?
- Yes. C44.591 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does C44.591 sit in the tabular list?
- Neoplasms (C00-D49), in the block Melanoma and other malignant neoplasms of skin (C43-C44).