Table 1.

ICD-9 codes used to identify potential cases of AHT.

ICD-9	Definition
362.81	Retinal hemorrhage
800.1-800.49	Closed skull vault fracture with intracranial injury
800.6-800.99	Open skull vault fracture with intracranial injury
801.1-801.49	Closed fracture of base of skull with intracranial injury
801.6-801.99	Open fracture base of skull with intracranial injury
803.1-803.49	Other closed skull fractures with intracranial injury
803.6-803.99	Other open skull fractures with intracranial injury
804.1-804.49	Multiple closed fractures to skull or face with intracranial injury
804.6-804.99	Multiple open fractures to skull or face with intracranial injury
850.0-850.99	Concussion (violent jar or shock or the condition that results from such injury)
851.0-851.99	Cerebral laceration and concussion
852.0-852.59	Subarachnoid, subdural, and extradural hemorrhage
853.0-853.19	Other and unspecified intracranial hemorrhage
854.0-854.19	Other and unspecified intracranial injury
959.01	Other and unspecified injury to head
959.8-959.9	Other and unspecified injury to other sites
E960.0-E969.9	Assault