801.99 — Open fracture of base of skull with intracranial injury of other and unspecified nature, with concussion, unspecified

801.99 is an ICD-9-CM diagnosis code for open fracture of base of skull with intracranial injury of other and unspecified nature, with concussion, unspecified. 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 S02.109B (Fracture of base of skull, unspecified side, initial encounter for open fracture), S06.890A (Other specified intracranial injury without loss of consciousness, initial encounter) and S06.9X0A (Unspecified intracranial injury 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.