Physical therapists must screen all individuals who have experienced a potential concussive event and document the presence or absence of symptoms, impairments, and functional limitations that may relate to a concussive event. Screening for Indicators of Emergency ConditionsA Physical therapists must screen patients who have experienced a recent potential concussive event for signs of medical emergency or severe pathology (eg, more serious brain injury, medical conditions, or cervical spine injury) that warrant further evaluation by other health care providers. Referral for further evaluation should be made as indicated (FIGURE 1). Differential DiagnosisA Physical therapists must evaluate for potential signs and symptoms of an undiagnosed concussion in patients who have experienced a concussive event but have not been diagnosed with concussion. Evaluation should include triangulation of information from patient/family/witness reports, the patient's past medical history, physical observation/examination, and the use of an age-appropriate symptom scale/checklist (see FIGURE 1 for diagnostic criteria).