Cornerstone Partners™ GPO

About Us

Cornerstone Partners GPO was founded in 2012 to create a new force in contracting for the Rheumatoid Arthritis, Gastroenterology, and Allergy/Asthma communities. Cornerstone Partners GPO is now the largest group purchasing organization exclusively for Rheumatology, Gastroenterology and Infusion Centers.

We will continue to leverage the critical mass of our membership to deliver the highest quality products and value-added services to our members at the lowest cost. We will strive for better contracts and additional services to enable our collective membership the opportunity to prosper.

Our goal is to be the ultimate partner for both our members and our manufacturers.


Merry Wyman

Merry serves as the GPO contract manager. As with her team, her primary focus is customer service and support a variety of administrative functions centered on elevating the customer experience. Merry is the primary point of contact for contract administration, membership alignment, and eligibility for customer practices. Metro Medical believes in the value of a single point of contact that customers can rely on to drive an optimal and efficient experience. Merry maintains a commitment to living out this commitment every day.

Cody Edwards

Cody manages all day to day functions for the GPO with respect to eligibility, membership, and reporting & analysis for various manufacturer programs. An extension of the Metro Medical commitment to customer service, Cody works closely with both internal and external GPO partners and stakeholders to support maximal benefit to customers.