Key People

The people at Prime are dedicated to you, our members, by helping you to achieve your cost containment goals. Our staff, both locally and at MedAssets, bring years of experience, specific expertise, and substantial industry knowledge to our jobs. Meeting our members’ needs is paramount in everything we do. Here is a brief sketch of some of the key people supporting our members. We look forward to working with you!

James Johnston, Vice President

Mr. Johnston is responsible for the oversight of sales and marketing, customer relationship management, and Prime operations. Mr. Johnston also leads new program development, and assists with strategic planning. Mr. Johnston has more than 28 years of healthcare sales and group purchasing organization experience. He received his B.A. from Loyola University, Baltimore.

Amy Ginsberg, Senior Client Manager

Ms. Ginsberg began her career with Prime in 1991. Ms. Ginsberg has a B.S. degree in Biology with minor in Italian/French from Boston University and Circolo Fiologico, Milan, Italy. Ms. Ginsberg has over thirty-three years’ experience in the health care sales industry serving all sectors from acute care institutions to physicians. Ms. Ginsberg meets regularly with our members to identify and serve their needs.

Diane Bruno, Client Manager

Ms. Bruno joined Prime as Regional Client Manager in January, 2012. Ms. Bruno 27 year career spans the healthcare procurement services industry, most recently serving as Director of Contracting for Omnicare/Tidewater Group Purchasing. Among other roles she spent 10 years with Genesis Health Ventures as Membership Services and Contracts Director. Ms. Bruno holds a degree in Health Science and studied business management at Notre Dame of Maryland University.


Prime's national affiliate, MedAssets, has a large staff of experienced professionals with special expertise in their specialties including Medical Surgical, Radiology, Distribution, Food and Nutrition, Pharmaceuticals, Alternate Care, Laboratory and Administrative contract portfolios.

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Prime is an affiliate of Maryland Hospital Association Icon Maryland Hospital Association