Skip to navigation Skip to Content


Search Marshfield Clinic Health System
Join a world-class health system. Find jobs

Marshfield Clinic Board of Directors


 Board of Directors

Matthew Oelstrom, M.D., Chairperson

Elvis Peter, M.D., Vice Chairperson

Kent Ray, D.O., Secretary

Matthew Thomas, M.D., Treasurer

Jessica Wernberg, M.D., Central Division 1 Director

Christopher J. Adler, M.D., Central Division 2 Director

Jayanth Vedre, M.D., Central Division 3 Director

Barbara Boyer, M.D., North Division Director

Katherine Winiarczyk, D.O., Northwest Division Director

Sanjay Kumar, M.D., East Division Director

David Junker, M.D., West Division Director

Ex-Officio Non-Voting Members

Edward G. Fernandez, M.D., Marshfield Clinic, Inc., Executive Director

Brian Hoerneman, M.D., Marshfield Clinic Health System, Inc., C.E.O. Interim

Clinic Board