C79.31: Secondary malignant neoplasm of brain
C79.31 is a billable, specific ICD-10-CM code for secondary malignant neoplasm of brain. It is valid for submission on a claim.
Check C79.31 with the rest of the claim: free scrubberExcludes1 inherited from the categories above C79.31
A category’s note binds every code beneath it.
Written on C79: Secondary malignant neoplasm of other and unspecified sites
- secondary carcinoid tumors (C7B.-)
- secondary neuroendocrine tumors (C7B.-)
Risk adjustment
C79.31 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 17 Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic4.209 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
C79.31 is named in 70 Medicare coverage policies: 70 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
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Code history
Unchanged in every release from FY2024 to FY2027.