Physical therapy addresses the illness or injuries that limit a person's abilities to move and perform functional activities in their daily lives. PTs use an individual's history and physical examination to arrive at a diagnosis and establish a management plan and, when necessary, incorporate the results of laboratory and imaging studies like X-rays, CT-scan, or MRI findings.

Physical therapists can use sonography to diagnose and manage common musculoskeletal, nerve, and pulmonary conditions. Electrodiagnostic testing (e.g., electromyograms and nerve conduction velocity testing) may also be used.