Hospitals and health systems small and large trust HealthTrust Purchasing Group to get them a good deal. The company is a health care group purchasing organization (GPO) that negotiates competitive pricing contracts with manufacturers of medical equipment and supplies on behalf of its members. Those members include some 1,400 acute care hospitals, as well as thousands of doctor's offices, outpatient clinics, and other health care facilities. HealthTrust provides contract, acquisition, and logistics services to its customers, which include facilities owned by HCA, Community Health Systems, Catholic Health Initiatives, and Lifepoint Health. A unit of Parallon Business Solutions, the firm was established in 1999.