Aetna, Anthem, Cigna and UnitedHealth Group are examples of health care companies in the United States that provide medical specialties, according to Nasdaq. These groups fall under the health care sector that provides medical specialties to its clients.
UnitedHealth Group is a diversified health care company that focuses on providing clinical care resources, technology and information, according to UnitedHealthGroup. The company provides services through two platforms: Optum and UnitedHealthcare. Optum delivers health services enabled by technology and information, while UnitedHealthcare provides health care benefits and coverage.
Anthem provides health care solutions through its Blue-licensed affiliates and subsidiaries, such as Anthem Blue Cross and Anthem Blue Cross Blue Shield, reports Anthem, Inc. These subsidiaries offer a wide range of individual and group health benefits.