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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Injury And Poisoning 800-999 > Intracranial Injury, Excluding Those With Skull Fracture 850-854 > Concussion 850.* > 2007 ICD-9-CM Diagnosis 850.9 Concussion unspecified This code may be outdated. View the most recent version of ICD-9-CM 850.9 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) 30 minutes or less 850.11 31-59 minutes 850.12 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) 30 minutes or less 850.11 31-59 minutes 850.12 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