C71.6 Malignant neoplasm of cerebellum

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from C71 Malignant neoplasm of brain

Excludes1 (never code together)

• malignant neoplasm of cranial nerves (C72.2-C72.5)
• retrobulbar malignant neoplasm (C69.6-)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 20 — Lung and Other Severe Cancers
• CMS-HCC V22: HCC 10 — Lymphoma and Other Cancers
• RxHCC V08: HCC 22 — Prostate, Breast, Bladder, and Other Cancers and Tumors
• ESRD V24: HCC 10

MS-DRG index

Defines the logic of DRG(s) 054-055 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 191.6 Malignant neoplasm of cerebellum nos

Diagnosis Index entries for C71.6

• Medulloblastoma › desmoplastic
• Medulloblastoma › unspecified site
• Medullomyoblastoma › unspecified site
• Sarcoma (of) › cerebellar
• Sarcoma (of) › cerebellar › circumscribed (arachnoidal)
• Sarcoma (of) › circumscribed (arachnoidal) cerebellar

Nearby codes

• C71.1 Malignant neoplasm of frontal lobe
• C71.2 Malignant neoplasm of temporal lobe
• C71.3 Malignant neoplasm of parietal lobe
• C71.4 Malignant neoplasm of occipital lobe
• C71.5 Malignant neoplasm of cerebral ventricle
• C71.6 Malignant neoplasm of cerebellum (this code)
• C71.7 Malignant neoplasm of brain stem
• C71.8 Malignant neoplasm of overlapping sites of brain
• C71.9 Malignant neoplasm of brain, unspecified