Select Medical Holdings Corp. engages in the provision of medical rehabilitation services. It operates through the following segments: Specialty Hospitals, Outpatient Rehabilitation, and Concentra. The Specialty Hospitals segment involves in providing long term acute care hospital services and inpatient acute rehabilitative hospital care. The Outpatient Rehabilitation segment provides physical, occupational, and speech rehabilitation services through its clinics. The Concentra segment operates through its medical centers and contract services provided at employer worksites and Department of Veterans Affairs community-based outpatient clinics, which delivers occupational medicine, physical therapy, veteran's healthcare, and consumer health services. The company was founded by Robert A. Ortenzio and Rocco A. Ortenzio in October 2004 and is headquartered in Mechanicsburg, PA.