Leadership/Board of Directors

United Physicians Administration

Michael Williams, M.D., President and Chief Executive Officer
Deborah Withrow, Esq., Executive Vice President and Chief Operating Officer
John Vismara, Vice President of Information Technology
Lorraine Bilinski, Vice President of Corporate Informatics and Health Plan Initiatives
Kim Coleman, M.D., Medical Director


United Physicians’ leadership team is a unique combination of physicians and healthcare administrators with deep experience in private practice, hospital administration, managed care, ambulatory care, nursing administration, case management and finance.  Other managers at United Physicians hail from various health plans and hospital systems. The depth and varied backgrounds of the corporate staff form a culture of enterprise and agility to benefit physician shareholders and their clinical practices.

Board of Directors

United Physicians is governed by a board of directors comprising a diverse representation of physicians from primary and specialty care disciplines. Various committees carry out the directives of the board.

 2013 United Physicians Board of Directors

  • Seymour Baxter, M.D. (Chair)
  • Nancy Ajemian, M.D.
  • Simon Dixon, M.D.
  • Michael Genord, M.D.
  • Richard Gordon, M.D.
  • Marianne Huben, D.O.
  • David Hug, M.D.
  • Chadi Ibrahim, M.D.
  • Randall Jacobs, M.D.
  • Christine Karle, D.O.
  • Andrew Madak, D.O.
  • Vik Mali, M.D.
  • Joseph Masternick, D.O.
  • Martin McGough, M.D.
  • Ed Ruiz, M.D.
  • Carl Sarnacki, M.D.
  • David Scapini, M.D.
  • Daniel Schnaar, M.D.
  • John Seitz, M.D.
  • Niraj Shah, M.D.
  • Mary Beth Steele, M.D.
  • Charles Stroud, M.D.
  • Ted Tangalos, M.D.
  • Michael Treblin, M.D.
  • Marc Wittenberg, M.D.
  • Bohdan Zarewych, D.O.
 
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