2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Injury And Poisoning 800-999 > Intracranial Injury, Excluding Those With Skull Fracture 850-854 >
 2007 ICD-9-CM Diagnosis 850
Concussion On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date.
The 2009 version of ICD-9-CM 850 can be accessed here. - A nonspecific term used to describe transient alterations or loss of consciousness following closed head injuries. The duration of UNCONSCIOUSNESS generally lasts a few seconds, but may persist for several hours. Concussions may be classified as mild, intermediate, and severe. Prolonged periods of unconsciousness (often defined as greater than 6 hours in duration) may be referred to as post-traumatic coma (COMA, POST-HEAD INJURY). (From Rowland, Merritt's Textbook of Neurology, 9th ed, p418)
- 850 is a non-specific code that cannot be used to specify a diagnosis
850 includes: 850 excludes: - concussion with:
- head injury NOS (959.01)
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