Characterization & Treatment of Chronic Pain After Moderate to Severe TBI

Inclusion Criteria: * Participants must be enrolled in the TBI Model Systems National Database (TBNIMS NDB) at one of the collaborating sites and thus will meet the TBIMS NDB criteria which are: (1) medical documentation of TBI caused by external mechanical force with either loss of consciousness exceeding 30 minutes, post-traumatic amnesia lasting more than 24 hours, Glasgow Coma Scale score in ER of less than 13, or trauma related intracranial abnormality or neuroimaging abnormalities; (2) admitted to the TBI inpatient rehab program at study sites; and (3) minimum age of 16 \[18 for VA site\] Exclusion Criteria: * Participants unable to participate in the surveys themselves will not be included (i.e. no proxy surveys).