Onmark GPO

Onmark GPO is a leading group purchasing organization specifically designed to support community-based specialty practices, with a primary focus on oncology and hematology. As a core component of McKesson Specialty Health, Onmark provides its members with competitive drug pricing, clinical resources, and business tools to optimize practice performance and patient care. The organization leverages its significant scale to negotiate favorable contracts for pharmaceuticals, medical-surgical supplies, and laboratory services, helping independent practices remain financially viable. Beyond procurement, Onmark offers value-added services such as inventory management solutions, educational programs, and reimbursement support tailored to the needs of specialty providers.