AMS vs UNH

American Shared Hospital Services

American Shared Hospital Services leases radiosurgery and radiation therapy equipment to health care providers. The company offers radiosurgery equipment for the Gamma Knife stereotactic radiosurgery, a non-invasive procedure to treat malignant and benign brain tumors, and arteriovenous malformations, as well as for trigeminal neuralgia. It also provides financing services for Leksell Gamma Knife units. In addition, the company offers proton beam radiation therapy services in Orlando, Florida and Long Beach, California, as well as offers planning, installation, reimbursement, and marketing support services to its customers. As of March 1, 2021, it had thirteen operating Gamma Knife units located in the United States, as well as two in South America in Lima, Peru and Guayaquil, Ecuador. The company also operates one PBRT system. American Shared Hospital Services was founded in 1980 and is headquartered in San Francisco, California.

UnitedHealth Group Incorporated

UnitedHealth Group Incorporated operates as a diversified health care company in the United States. It operates through four segments: UnitedHealthcare, OptumHealth, OptumInsight, and OptumRx. The UnitedHealthcare segment offers consumer-oriented health benefit plans and services for national employers, public sector employers, mid-sized employers, small businesses, and individuals; health and well-being services to individuals age 50 and older, addressing their needs for preventive and acute health care services, as well as services dealing with chronic disease and other specialized issues for older individuals; Medicaid plans, children's health insurance program, and health care programs; medical and dental benefits; and hospital and clinical services. The OptumHealth segment provides access to networks of care provider specialists, health management services, care delivery, consumer engagement, and financial services. This segment serves individuals directly through care delivery systems, employers, payers, and government entities. The OptumInsight segment offers software and information products, advisory consulting arrangements, and managed services outsourcing contracts to hospital systems, physicians, health plans, governments, life sciences companies, and other organizations. The OptumRx segment provides pharmacy care services and programs, including retail network contracting, home delivery, specialty and compounding pharmacy, and purchasing and clinical, as well as develops programs in areas, such as step therapy, formulary management, drug adherence, and disease/drug therapy management. UnitedHealth Group Incorporated has partnership with the University of California, San Francisco to expand the mental health workforce in California. UnitedHealth Group Incorporated was incorporated in 1977 and is based in Minnetonka, Minnesota.