McKesson Corporation provides pharmaceuticals and medical supplies in the United States and internationally. It operates in three segments: U.S. Pharmaceutical and Specialty Solutions, European Pharmaceutical Solutions, and Medical-Surgical Solutions. The company distributes branded, generic, specialty, biosimilar, and over-the-counter pharmaceutical drugs, as well as other healthcare-related products; and offers practice management, technology, clinical support, and business solutions to community-based oncology and other specialty practices.

It also provides distribution and services to wholesale, institutional, and retail customers and serves patients and consumers in 13 European countries through approximately 2,000 own pharmacies and 6,900 participating pharmacies; and medical-surgical supply distribution, logistics, and other services to healthcare providers. In addition, the company provides software and analytics, network solutions, and technology-enabled services; automation solutions to its retail and hospital customers; health information exchange solutions; and innovative technologies that support retail pharmacies and manufacturers.

It serves retail national accounts, including national and regional chains, food and drug combinations, mail order pharmacies, and mass merchandisers; independent, and small and medium retail pharmacies; and institutional healthcare providers, such as hospitals, health systems, integrated delivery networks, and long-term care providers, as well as pharmaceutical manufacturers. McKesson Corporation was founded in 1833 and is headquartered in Irving, California.