C71.7 — Malignant neoplasm of brain stem
C71.7 is a billable, specific ICD-10-CM code for malignant neoplasm of brain stem. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Malignant neoplasm of fourth cerebral ventricle
- Infratentorial malignant neoplasm NOS
Other codes that can never be billed with C71.7
These codes carry an Excludes1 note pointing at C71.7. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C71.7 alone.
- C71.5Malignant neoplasm of cerebral ventricle
Risk adjustment
C71.7 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 20 Lung and Other Severe Cancers1.136 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.
Medicare coverage
C71.7 is named in 93 Medicare coverage policies — 93 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 C71. If C71.7 is not quite right, the correct code is usually one of these.
- C71.0Malignant neoplasm of cerebrum, except lobes and ventricles
- C71.1Malignant neoplasm of frontal lobe
- C71.2Malignant neoplasm of temporal lobe
- C71.3Malignant neoplasm of parietal lobe
- C71.4Malignant neoplasm of occipital lobe
- C71.5Malignant neoplasm of cerebral ventricle
- C71.6Malignant neoplasm of cerebellum
- C71.8Malignant neoplasm of overlapping sites of brain
- C71.9Malignant neoplasm of brain, unspecified
Questions about C71.7
- Is C71.7 a billable ICD-10-CM code?
- Yes. C71.7 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does C71.7 sit in the tabular list?
- Neoplasms (C00-D49), in the block Malignant neoplasms of eye, brain and other parts of central nervous system (C69-C72).