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Table 1 ICD Codes for Conditions leading to Acquired Brain Injury (ABI)Final List of Codes based on Feedback and Studies –Ontario Neurotrauma Foundation ABI Pilot Project

From: Direct cost associated with acquired brain injury in Ontario

I. Traumatic Causes  
Diagnosis ICD-10 Code and Description
1. Fracture of the skull S02.0 Skull
  S02.1 Base of skull
  S02.9 Skull and facial bones
S02.7 Multiple fractures involving skull and facial bones
  S02.89 Fractures of other unspecified skull and facial bones
2. Intracranial Injury excluding those with skull fracture S06.0 Concussion
  S06.2 Diffuse brain injury
  S06.4 – Epidural Hemorrhage
  S06.5 – Traumatic subdural hemorrhage
  S06.6 – Traumatic subarachnoid hemorrhage
  S06.8 – Other intracranial injuries
  S06.1 – Traumatic cerebral edema
  S06.3 – Focal brain injury
  S06.9 – Intracranial injury unspecified
  S09.7 – Multiple injuries of head
  S09.8 – Other unspecified injuries of head
  S09.9 – Unspecified injury of head
3. Other causes including late effects of injuries poisonings toxic effects & other external causes T90.2 – Sequelae of fracture of skull and facial bones
  T90.5 – Sequelae of intracranial injury
  T90.8 - Sequelae of other specified injuries of head
  T90.9 – Sequelae of unspecified injury of head
  T96 – Sequelae of poisoning by drugs medicaments and biological substances
  T97 – Sequelae of toxic effects of substances chiefly nonmedicinal as to source
  T98.2 – Sequelae of certain early complications of trauma
II. Non Traumatic Causes  
Diagnosis ICD-10 Code and Description
1. Toxic effects of substances chiefly non-medical as to source T51– Toxic effect of alcohol
  T56 – Toxic effect of metals
  T58– Toxic effect of carbon monoxide
2. Complications of surgical & medical care not elsewhere classified G93.8 Other specified disorders of the brain (including post-radiation encephalopathy)
3. Anoxia G93.1– Anoxic brain damage (includes all causes of anoxia except those occurring following abortions ectopic pregnancy labour & delivery & newborn)
  T75.1– Drowning and nonfatal submersion
  T71– Asphyxiation suffocation (by strangulation)
4. Vascular insults I62.0 – Subdural hemorrhage
(Aneurysm and vascular malformations) I62.9 – Unspecified intracranial hemorrhage
RVL Needs clarification  
Aneurysm I77.0  
Malformation Q28.0 –Q28.9  
Traumatic aneurysm T14.5  
5. Brain Tumours C71 – Malignant neoplasm of brain
  C79.3 – Secondary malignant neoplasm of brain and cerebral meninges
  D33.0-D33.3 – Benign neoplasm of brain and other parts of central nervous system
  D32.0 – Benign neoplasm of cerebral meninges
  D43 – Neoplasm of uncertain or unknown behaviour of brain and central nervous system
  C70 – Malignant neoplasm of brain
  D43.2 – Neoplasm of brain unspecified
  D42.0 - Neoplasm of uncertain or unknown behaviour of cerebral meninges
6. Encephalitis A81.1– Subacute sclerosing encephalitis
  B00.4 – Herpesviral meningoencephalitis
  B05.0 – Postmeasles encephalitis
  A83.0 – Japanese encephalitis
  A83.2 – Eastern equine encephalitis
  A86.0 – Unspecified viral encephalitis
  G04.0 – Acute Disseminated encephalitis
  G04.8 – Other encephalitis myelitis and encephalomyelitis
  G04.9 – Encephalitis myelitis and encephalomyelitis unspecified
  B01.1 – Varicella encephalitis
  B02.0 – Zoster encephalitis
  G05. – Encephalitis myelitis and encephalomyelitis in diseases classified elsewhere
7. Metabolic Encephalopathies E10.0 (Type I) E11.0 (Type II)
  E13.0 – Other specified diabetes mellitus with coma
  E14.0 – Unspecified diabetes mellitus with coma
  E15 – Nondiabetic hypoglycaemic coma
  F07.2 – post concussion syndrome
8. Meningitis G06.0 – intracranial abscess and granuloma
  G06.1 – Intraspinal abscess and granuloma G06.2 – Extradural and subdural abscess unspecified
  G93.0 – Cerebral cysts
  A87 – Viral meningitis
  B01.0 – Varicella meningitis
  B37.5 – Candidal meningitis
  G00 – Bacterial meningitis not elsewhere classified
  G01* – Meningitis in bacterial diseases classified elsewhere
  G02* – Meningitis in other infectious and parasitic diseases classified elsewhere
  G03. – Meningitis due to other and unspecified causes