McKesson Corp. engages in the provision of supply chain management solutions, retail pharmacy, community oncology and specialty care, and healthcare information technology. It operates through the following segments: U.S. Pharmaceutical; International; Medical-Surgical Solutions; and Prescription Technology Solutions (â€œRxTSâ€). The U.S. Pharmaceutical segment distributes branded, generic, specialty, biosimilar and over-the-counter pharmaceutical drugs, and other healthcare-related products; provides practice management, technology, clinical support, and business solutions to community-based oncology, and other specialty practices; and sells financial, operational, and clinical solutions to pharmacies and provides consulting, outsourcing, technological, and other services. The International segment provides distribution and services to wholesale, institutional, and retail customers in 13 European countries and Canada. The Medical-Surgical Solutions segment provides medical-surgical supply distribution, logistics, and other services to healthcare providers, including physician offices, surgery centers, nursing homes, hospital reference labs, and home health care agencies. The RxTS segment brings together CoverMyMeds, RelayHealth, RxCrossroads, and McKesson Prescription Automation, including Multi-Client Central Fill as a Service, to serve biopharma and life sciences partners and patients. The company was founded by John McKesson and Charles Olcott in 1833 and is headquartered in Irving, TX.