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C50.A0

C50.A0: Malignant inflammatory neoplasm of unspecified breast

Billable / specific codeICD-10-CMunspecified

C50.A0 is a billable, specific ICD-10-CM code for malignant inflammatory neoplasm of unspecified breast. It is valid for submission on a claim.

Check C50.A0 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above C50.A0

A category’s note binds every code beneath it.

Written on C50: Malignant neoplasm of breast

Other codes that can never be billed with C50.A0

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • D05Carcinoma in situ of breast
  • C49Malignant neoplasm of other connective and soft tissue
  • C49.3Malignant neoplasm of connective and soft tissue of thorax

Risk adjustment

C50.A0 risk-adjusts. Under the CMS-HCC V28 model it maps to these categories:

  • HCC 22 Bladder, Colorectal, and Other Cancers0.363 RAF
  • HCC 23 Prostate, Breast, and Other Cancers and Tumors0.186 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

C50.A0 is named in 17 Medicare coverage policies: 17 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52478External Breast Prostheses - Policy Article
  • A52479Oral Anticancer Drugs - Policy Article
  • A52480Oral Antiemetic Drugs (Replacement for Intravenous Antiemetics) - Policy Article
  • A54338Billing and Coding: MolDX: Germline testing for use of PARP inhibitors

Code history

  • addedFY2024-FY2027

    Malignant inflammatory neoplasm of unspecified breast

Other codes under C50.A

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.