Malignant neoplasm of cerebellum

This code signifies a primary cancerous tumor originating in the cerebellum, a region of the brain located at the back of the skull responsible for motor control, coordination, and balance. It represents a malignant growth of cerebellar tissue, distinct from metastatic lesions.

Apply this code when documentation confirms a primary malignant neoplasm confined to the cerebellum. This typically follows a pathological diagnosis from a biopsy or surgical resection, or strong imaging evidence (e.g., MRI) coupled with clinical findings indicating a primary cerebellar tumor.

• Differentiate from secondary (metastatic) brain tumors; for metastases to the cerebellum, use the appropriate secondary malignant neoplasm code.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless another condition is specifically identified as the principal diagnosis.
• Ensure documentation specifies "primary" or "malignant" and clearly identifies the cerebellum as the tumor's origin.