ICD-9-CM diagnosis code (retired)
800.55 — Open fracture of vault of skull without mention of intracranial injury, with prolonged [more than 24 hours] loss of consciousness, without return to pre-existing conscious level
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 800.55
800.55 is an ICD-9-CM diagnosis code for open fracture of vault of skull without mention of intracranial injury, with prolonged [more than 24 hours] loss of consciousness, without return to pre-existing conscious level. 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, S02.0XXB (Fracture of vault of skull, initial encounter for open fracture). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- S02.0XXBFracture of vault of skull, initial encounter for open fractureapproximate
Common questions about 800.55
What is the ICD-10 code for ICD-9 800.55?
- The GEMs map 800.55 to ICD-10-CM S02.0XXB.
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.