ICD-10 Code C71.6 – Malignant neoplasm of cerebellum (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C71.6 – Malignant neoplasm of cerebellum
What it is
C71.6 identifies a malignant tumor arising in the cerebellum, the part of the brain that helps coordinate movement and balance. Use this code when documentation states a primary malignant neoplasm of the cerebellum.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include gait imbalance, coordination problems, dizziness, headache, nausea, or vomiting, depending on tumor size and location.
When to use this code
Use C71.6 when the provider documents a primary malignant neoplasm of the cerebellum. Apply it for confirmed cerebellar cancer diagnoses on imaging, pathology, or specialist assessment when the site is clearly stated.
If the record only says “brain tumor” or gives an uncertain site, check documentation before coding. Confirm whether the lesion is primary, metastatic, or an unspecified intracranial malignancy.
Do not use for
Do not use C71.6 for benign cerebellar tumors, metastatic disease to the cerebellum, or malignancies in other brain regions. Check documentation if the site or primary origin is unclear.
Coding tip
Code the exact anatomic site documented; cerebellum is not interchangeable with cerebrum, brainstem, or unspecified brain.