CVS Health Corporation, together with its subsidiaries (CVS Health), is a pharmacy company. The Company operates through three business segments: Pharmacy Services, Retail Pharmacy and Corporate. The Pharmacy Services segment provides a range of pharmacy benefit management (PBM) services, such as plan design offerings and administration, formulary management, Medicare Part D Services, mail order pharmacy, specialty pharmacy, retail pharmacy network management, prescription management systems, clinical services, disease management programs and medical pharmacy management. Its Retail Pharmacy segment includes 7,822 retail drugstores, of which 7,765 operated a pharmacy, its online retail pharmacy Websites, CVS.com, Navarro.com and Onofre.com.br, 17 onsite pharmacy stores and its retail health care clinics. The Corporate segment provides management and administrative services to support the overall operations of the Company.