Diamond Pharmacy Services is one of the United States largest correctional pharmacy service providers and one of Pennsylvania's largest independently owned nursing facility pharmacy service providers. The company operates an automated closed-door institutional pharmacy and medical supply location, two retail pharmacies and a retail medical supply store all located in Pennsylvania. Diamond serves more than 270,000 inmates in nearly 40 states. Since 1983, the company has been providing patient-specific prescription mail order services to state, county and federal adult, juvenile and prerelease facilities. It provides total offsite pharmacy management systems customized specifically to meet customers needs. Services available for nursing facilities include consulting services, medical records, formulary management, intravenous therapy, quality assurance programs, respiratory therapy and medical supplies. Diamond Pharmacy Services is headquartered in Indiana, Pa.