ICD-9-CM diagnosis code (retired)
851.86 — Other and unspecified cerebral laceration and contusion, without mention of open intracranial wound, with loss of consciousness of unspecified duration
About ICD-9-CM 851.86
851.86 is an ICD-9-CM diagnosis code for other and unspecified cerebral laceration and contusion, without mention of open intracranial wound, with loss of consciousness of unspecified duration. 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 one ICD-10-CM code, S06.339A (Contusion and laceration of cerebrum, unspecified, with loss of consciousness of unspecified duration, initial encounter). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- S06.339AContusion and laceration of cerebrum, unspecified, with loss of consciousness of unspecified duration, initial encounterapproximate
Common questions about 851.86
What is the ICD-10 code for ICD-9 851.86?
- The GEMs map 851.86 to ICD-10-CM S06.339A.
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.