McKesson Corporation is a diversified healthcare services leader that partners with biopharma companies, care providers, pharmacies, manufacturers, and governments to deliver insights, products, and services to make quality care more accessible and affordable. The company operates in four segments: U.S. Pharmaceutical, Prescription Technology Solutions, Medical-Surgical Solutions, and International. McKesson's key markets include the U.S., Canada, and Europe, with a focus on supply chain excellence and innovative solutions.