851.50 — Cerebellar or brain stem contusion with open intracranial wound, unspecified state of consciousness

851.50 is an ICD-9-CM diagnosis code for cerebellar or brain stem contusion with 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 3 ICD-10-CM codes, such as S01.90XA (Unspecified open wound of unspecified part of head, initial encounter), 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. Some mappings are combinations: more than one ICD-10 code is needed to fully express the ICD-9 code.