INTRACRANIAL INJURY, EXCLUDING THOSE WITH SKULL FRACTURE (850-854)

Concussion
Cerebral laceration and contusion
Subarachnoid, subdural, and extradural hemorrhage, following injury
Other and unspecified intracranial hemorrhage following injury
Intracranial injury of other and unspecified nature

Excludes: intracranial injury with skull fracture (800-801 and 803-804, except .0 and .5)
open wound of head without intracranial injury (870.0-873.9)
skull fracture alone (800-801 and 803-804 with .0, .5)
Note: The description "with open intracranial wound," used in the fourth-digit subdivisions, includes those specified as open or with mention of infection or foreign body.
The following fifth-digit subclassification is for use with categories 851-854:
0 unspecified state of consciousness
1 with no loss of consciousness
2 with brief [less than one hour] loss of consciousness
3 with moderate [1-24 hours] loss of consciousness
4 with prolonged [more than 24 hours] loss of consciousness and return to pre-existing conscious level
5 with prolonged [more than 24 hours] loss of consciousness without return to pre-existing conscious level
Use fifth-digit 5 to designate when a patient is unconscious and dies before regaining consciousness, regardless of the duration of the loss of consciousness
6 with loss of consciousness of unspecified duration
9 with concussion, unspecified

850 Concussion

Includes: commotio cerebri
Excludes: concussion with:
cerebral laceration or contusion (851.0-851.9)
cerebral hemorrhage (852-853)
head injury NOS (959.01)

850.0 With no loss of consciousness

Concussion with mental confusion or disorientation, without loss of consciousness

850.1 With brief loss of consciousness

Loss of consciousness for less than one hour

850.2 With moderate loss of consciousness

Loss of consciousness for 1-24 hours

850.3 With prolonged loss of consciousness and return to pre-existing conscious level

Loss of consciousness for more than 24 hours with complete recovery

850.4 With prolonged loss of consousness, without return to pre-existing conscious level

850.5 With loss of consciousness of unspecified duration

850.9 Concussion, unspecified

851 Cerebral laceration and contusion

Requires fifth digit. See beginning of section 850-854 for codes and definitions.

851.0 Cortex (cerebral) contusion without mention of open intracranial wound

851.1 Cortex (cerebral) contusion with open intracranial wound

851.2 Cortex (cerebral) laceration without mention of open intracranial wound

851.3 Cortex (cerebral) laceration with open intracranial wound

851.4 Cerebellar or brain stem contusion without mention of open intracranial wound

851.5 Cerebellar or brain stem contusion with open intracranial wound

851.6 Cerebellar or brain stem laceration without mention of open intracranial wound

851.7 Cerebellar or brain stem laceration with open intracranial wound

851.8 Other and unspecified cerebral laceration and contusion, without mention of open intracranial wound

Brain (membrane) NOS

851.9 Other and unspecified cerebral laceration and contusion, with open intracranial wound

852 Subarachnoid, subdural, and extradural hemorrhage, following injury

Requires fifth digit. See beginning of section 850-854 for codes and definitions.
Excludes: cerebral contusion or laceration (with hemorrhage) (851.0-851.9)

852.0 Subarachnoid hemorrhage following injury without mention of open intracranial wound

Middle meningeal hemorrhage following injury

852.1 Subarachnoid hemorrhage following injury with open intracranial wound

852.2 Subdural hemorrhage following injury without mention of open intracranial wound

852.3 Subdural hemorrhage following injury with open intracranial wound

852.4 Extradural hemorrhage following injury without mention of open intracranial wound

Epidural hematoma following injury

852.5 Extradural hemorrhage following injury with open intracranial wound

853 Other and unspecified intracranial hemorrhage following injury