Select Medical Holdings Corporation operates critical illness recovery hospitals, rehabilitation hospitals, outpatient rehabilitation clinics, and occupational health centers. Its segments include critical illness recovery hospital, rehabilitation hospital, outpatient rehabilitation, and Concentra. The critical illness recovery hospital segment consists of hospitals designed to serve the needs of patients recovering from critical illnesses, often with complex medical needs. The rehabilitation hospital segment consists of hospitals designed to serve patients that require intensive physical rehabilitation care. The outpatient rehabilitation segment consists of clinics that provide physical, occupational, and speech rehabilitation services. Its Concentra segment consists of occupational health centers that provide workers’ compensation injury care, physical therapy, and consumer health services and onsite clinics located at employer worksites that deliver occupational health services.