McKesson Corporation is a diversified healthcare services leader that distributes pharmaceuticals, medical-surgical supplies, and specialty products to pharmacies, hospitals, physicians, and other healthcare providers across North America while also offering technology platforms and consulting services. The company generates revenue primarily through the distribution of branded, generic, specialty, and over-the-counter pharmaceutical drugs and medical-surgical products, along with solutions for medication access, prior authorization, prescription transparency, and clinical trial support. McKesson serves a broad customer base including retail and institutional pharmacies, physician practices, oncology networks, surgery centers, and healthcare plans, competing on scale, product breadth, service quality, and technology capabilities in markets dominated by a handful of large distributors and specialized healthcare service providers.