ICD-9-CM diagnosis code (retired)
850.5 — Concussion with loss of consciousness of unspecified duration
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 850.5
850.5 is an ICD-9-CM diagnosis code for concussion 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, S06.0X9A (Concussion with loss of consciousness of unspecified duration, initial encounter). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- S06.0X9AConcussion with loss of consciousness of unspecified duration, initial encounterapproximate
Common questions about 850.5
What is the ICD-10 code for ICD-9 850.5?
- The GEMs map 850.5 to ICD-10-CM S06.0X9A.
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.