Home > 2015 ICD-9-CM Diagnosis Codes > Injury And Poisoning 800-999 > Intracranial Injury, Excluding Those With Skull Fracture 850-854 > Concussion 850-
Specific code 2015 ICD-9-CM Diagnosis Code 850.9
Concussion, unspecified
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 850.9 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 850.9 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 850.9 converts approximately to:
  • 2015/16 ICD-10-CM S06.0X0A Concussion without loss of consciousness, initial encounter
Approximate Synonyms
  • Concussion
Clinical Information
  • A concussion is a type of brain injury. It is a short loss of normal brain function in response to a head injury. Concussions are a common type of sports injury. You can also suffer from one if you suffer a blow to the head or hit your head after a fall. After a concussion, you may have a headache or neck pain. You may also experience nausea, ringing in your ears, dizziness, or tiredness. You may feel dazed or not your normal self for several days or weeks after the injury. Consult your health professional if you notice any of your symptoms getting worse, or if you have more serious symptoms such as seizures or trouble walking or sleeping
  • 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)
  • A violent jar or shock, or the condition which results from such an injury
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
 850.5 ICD9Data.com 851 
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 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.
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