Select Medical Holdings Corporation is an operator of specialty hospitals and outpatient rehabilitation clinics. The Company, through its contract therapy business, provides medical rehabilitation services on a contracted basis to nursing homes, hospitals, assisted living and senior care centers, schools and work sites. It operates through three business segments: specialty hospitals, outpatient rehabilitation and Concentra. Its Other activities include corporate services and other minority investments in healthcare related businesses. It is an operator of specialty hospitals in the United States. It operates over 127 facilities in over 30 states, including over 110 long-term acute care hospitals, or LTCHs. It is an operator of outpatient rehabilitation clinics in the United States, with over 1,040 facilities in over 30 states and the District of Columbia. It also provides occupational health services in the United States.