851.40 — Cerebellar or brain stem contusion without mention of open intracranial wound, unspecified state of consciousness

851.40 is an ICD-9-CM diagnosis code for cerebellar or brain stem contusion without mention of open intracranial wound, unspecified state of consciousness. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.

The CMS General Equivalence Mappings translate it to 2 ICD-10-CM codes, such as S06.370A (Contusion, laceration, and hemorrhage of cerebellum without loss of consciousness, initial encounter) and S06.380A (Contusion, laceration, and hemorrhage of brainstem without loss of consciousness, initial encounter). All of these are approximate matches, so review the record to pick the right one.