Select Medical Holdings Corporation is an operator of specialty hospitals, outpatient rehabilitation clinics and occupational medicine centers in the United States. The Company's segments include specialty hospitals, outpatient rehabilitation, Concentra and Other. The specialty hospitals segment consists of hospitals designed to serve the needs of long term acute patients and hospitals designed to serve patients that require intensive medical rehabilitation care. The outpatient rehabilitation segment consists of clinics that provide physical, occupational, and speech rehabilitation services. The Concentra segment consists of medical centers and contract services provided at employer worksites and Department of Veterans Affairs community-based outpatient clinics (CBOCs) that deliver occupational medicine, physical therapy, veteran's healthcare, and consumer health services. As of December 31, 2016, the Company had operations in 46 states and the District of Columbia.