Select Medical is one of the largest operators of critical illness recovery hospitals (previously referred to as long term acute care hospitals), rehabilitation hospitals (previously referred to as inpatient rehabilitation facilities), outpatient rehabilitation clinics, and occupational health centers in the United States based on the number of facilities. As of June 30, 2019, Select Medical had operations in 47 states and the District of Columbia. Select Medical operated 100 critical illness recovery hospitals in 28 states, 28 rehabilitation hospitals in 12 states, and 1,695 outpatient rehabilitation clinics in 37 states and the District of Columbia. Concentra, a joint venture subsidiary, operated 526 occupational health centers in 41 states as of June 30, 2019. Concentra also provides contract services at employer worksites and Department of Veterans Affairs community-based outpatient clinics.