Specific code 2012 ICD-9-CM Diagnosis Code 850.9
Concussion, unspecified
  • Short description: Concussion NOS.
  • ICD-9-CM 850.9 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 850.9 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
  • You are viewing the 2012 version of ICD-9-CM 850.9.
  • More recent version(s) of ICD-9-CM 850.9: 2013 2014.
Disease Synonyms
  • Concussion
Convert to ICD-10-CM: 850.9 converts approximately to:
  • 2014 ICD-10-CM S06.0X0A Concussion without loss of consciousness, initial encounter
ICD-9-CM Volume 2 Index entries containing back-references to 850.9:
  • Blast
    • injury 869.0
      • with open wound into cavity 869.1
      • abdomen or thorax - see Injury, internal, by site
      • brain (see also Concussion, brain) 850.9
        • with skull fracture - see Fracture, skull
      • ear (acoustic nerve trauma) 951.5
        • with perforation, tympanic membrane - see Wound, open, ear, drum
      • lung (see also Injury, internal, lung) 861.20
      • otitic (explosive) 388.11
  • 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
    • cerebral - see Concussion, brain
    • conus medullaris (spine) 952.4
    • hydraulic - see Concussion, blast
    • internal organs - see Injury, internal, by site
    • labyrinth - see Injury, intracranial
    • 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
    • underwater blast - see Concussion, blast
  • Encephalopathy (acute) 348.30
    • due to
      • birth injury (intracranial) 767.8
      • dialysis 294.8
      • drugs - (see also Table of Drugs and Chemicals) 349.82
      • hyperinsulinism - see Hyperinsulinism
      • influenza (virus) (see also Influenza) 487.8
      • lack of vitamin (see also Deficiency, vitamin) 269.2
      • nicotinic acid deficiency 291.2
      • serum (nontherapeutic) (therapeutic) 999.59
      • syphilis 094.81
      • trauma (postconcussional) 310.2
        • current (see also Concussion, brain) 850.9
          • with skull fracture - see Fracture, skull, by site, with intracranial injury
      • vaccination 323.51
    • traumatic (postconcussional) 310.2
      • current (see also Concussion, brain) 850.9
        • with skull fracture - see Fracture, skull, by site, with intracranial injury
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 850.9 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2012 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.