2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Injury And Poisoning 800-999 > Intracranial Injury, Excluding Those With Skull Fracture 850-854 > Concussion 850.* >  2008 ICD-9-CM Diagnosis 850.9
Concussion unspecified 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 Therefore, this code may be out of date.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 850.9 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)
- 850.9 is a specific code that can be used to specify a diagnosis
- 850.9 contains 7 index entries
- View the ICD-9-CM Volume 1 850.* hierarchy
Index entries containing 850.9:- Blast
- injury 869.0
- brain (see also Concussion, brain)
 850.9- with skull fracture - see Fracture, skull
Commotio (current)- cerebri (see also Concussion, brain) 850.9
- with skull fracture - see Fracture, skull, by site
Commotion (current)- brain (without skull fracture) (see also Concussion, brain) 850.9
- with skull fracture - see Fracture, skull, by site
Concussion (current) 850.9- with
- loss of consciousness 850.5
- brief (less than one hour)
- moderate (1-24 hours) 850.2
- prolonged (more than 24 hours) (with complete recovery) (with return to pre-existing conscious level) 850.3
- without return to pre-existing conscious level 850.4
- mental confusion or disorientation (without loss of consciousness) 850.0
- with loss of consciousness - see Concussion, with, loss of consciousness
- without loss of consciousness 850.0
- blast (air) (hydraulic) (immersion) (underwater) 869.0
- with open wound into cavity 869.1
- abdomen or thorax - see Injury, internal, by site
- brain - see Concussion, brain
- ear (acoustic nerve trauma) 951.5
- with perforation, tympanic membrane - see Wound, open, ear drum
- thorax - see Injury, internal, intrathoracic organs NEC
- brain or cerebral (without skull fracture) 850.9
- with
- loss of consciousness 850.5
- brief (less than one hour)
- moderate (1-24 hours) 850.2
- prolonged (more than 24 hours) (with complete recovery) (with return to pre-existing conscious level) 850.3
- without return to pre-existing conscious level 850.4
- mental confusion or disorientation (without loss of consciousness) 850.0
- with loss of consciousness - see Concussion, brain, with, loss of consciousness
- skull fracture - see Fracture, skull, by site
- without loss of consciousness 850.0
- cauda equina 952.4
- cerebral - see Concussion, brain
- conus medullaris (spine) 952.4
- hydraulic - see Concussion, blast
- internal organs - see Injury, internal, by site
- labyrinth - see Injury, intracranial
- ocular 921.3
- osseous labyrinth - see Injury, intracranial
- spinal (cord) - see also Injury, spinal, by site
- due to
- broken
- back - see Fracture, vertebra, by site, with spinal cord injury
- neck - see Fracture, vertebra, cervical, with spinal cord injury
- fracture, fracture dislocation, or compression fracture of spine or vertebra - see Fracture, vertebra, by site, with spinal cord injury
- syndrome 310.2
- underwater blast - see Concussion, blast
Encephalopathy (acute) 348.30- due to
- trauma (postconcussional) 310.2
- current (see also Concussion, brain) 850.9
- with skull fracture - see Fracture, skull, by site, with intracranial injury
- traumatic (postconcussional) 310.2
- current (see also Concussion, brain) 850.9
- with skull fracture - see Fracture, skull, by site, with intracranial injury
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