TBI Classifications & Severity

Traumatic brain injuries are classified by severity based on loss of consciousness, post-traumatic amnesia, and the Glasgow Coma Scale score.

Mild TBI (Concussion)

• Loss of consciousness: 0-30 minutes
• Post-traumatic amnesia: Less than 24 hours
• GCS score: 13-15

Despite being called "mild," these injuries can cause lasting cognitive problems.

Moderate TBI

• Loss of consciousness: 30 minutes to 24 hours
• Post-traumatic amnesia: 1-7 days
• GCS score: 9-12

Severe TBI

• Loss of consciousness: More than 24 hours
• Post-traumatic amnesia: More than 7 days
• GCS score: 3-8

Severe TBI often results in permanent disability requiring lifetime care.