850.4
Concussion with prolonged loss of consciousness, without return to pre-existing conscious level
The ICD-9 code for concussion with prolonged loss of consciousness, without return to pre-existing conscious level is 850.4.
Legacy code — retired October 1, 2015ICD-10-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents.
View ICD-9 → ICD-10 crosswalk for 850.4 →