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Group Health Physicians Leadership

President and Chief Medical Executive

Dr. Steve Tarnoff

Stephen Tarnoff, MD, is President/Chief Medical Executive of Group Health Physicians, a professional corporation of nearly 1400 physicians and clinicians. GHP provides and manages medical services for Group Health Cooperative. Dr. Tarnoff also continues to serve as the executive medical director of the Group Practice Division, overseeing the care of over 425,000 patients in Group Health-operated medical facilities.

Dr. Tarnoff has practiced as family physician at Group Health for more than 25 years, and has gone on to hold numerous leadership positions within the organization including Chief of Central Region Primary Care, Chief of Consultative Specialty Care Services, Medical Director for the Group Practice Division, Medical Director for Medicare and Medicaid, and Medical Director for Group Health’s contracted network in Western Washington.

Over his career, his responsibilities have included strategy and business development, Medicare plan quality, revenue cycle management, documentation and coding, health plan product development, community relations and health public policy issues.

Dr. Tarnoff’s professional life has been devoted to improving the clinical and service performance and operational efficiencies of our integrated care delivery system. His leadership roles have emphasized creating a culture that focuses on continuous quality improvement, a better care experience, and the efficient and appropriate use of medical resources in order to maximize the value to patients and payers. He has twice been elected to the GHP Board of Directors and his contributions toward improving patient care have been recognized with a “Lifetime Achievement Award” by Group Health Physicians.

He graduated from the University of California, Berkeley and the University of Southern California, School of Medicine, and completed his residency in Family Medicine at the University of Washington. He completed a Fellowship in Medical Education and Health Policy at the Association of American Medical Colleges (AAMC). He is Board Certified in Family Medicine and a member of the Washington Academy of Family Physicians and the Washington State Medical Association.

Medical Group Leaders

Marc West

Executive Vice President
Group Health Physicians
EVP of Care Delivery Systems
Group Health Cooperative
Marc West

Dr. Paul Sherman
Executive Medical Director
Health Plan Division
Paul Sherman, MD
Dr. Jeffrey Grice
Associate Medical Director
Human Resources & Compliance
Jeffrey Grice, MD
Dr. Bruce Smith
Associate Medical Director
Medicare Advantage
Bruce C. Smith, MD
Dr. Matt Handley
Associate Medical Director
Quality & Informatics
Matt Handley, MD
Dr. Paul Fletcher
Medical Director
Primary Care
Paul Fletcher, MD
Dr. Kate Brostoff
Associate Medical Director
Research Translation
Robert Reid, MD, PhD
Dr. Marc Mora
Medical Director
Consultative Specialty Services
Marc Mora, MD
Dr. Marty Levine
Assistant Medical Director
Primary Care - Bellevue, Everett, Factoria, Northshore, Redmond, Renton
Marty Levine, MD
PA Randy Ideker
Assistant Medical Director
Primary Care - Seattle, Lynnwood, Northgate, Rainier
Randy Ideker, PA-C
Dr. Michael Toubbeh
Assistant Medical Director
Surgical Services
Michael Toubbeh, MD
Dr. Philip Paros
Assistant Medical Director and Service Line Chief
Eyecare Services
Philip Paros, MD
Dr. Steve Lavine
Assistant Medical Director
Perioperative and Central Hospital Services
Steve Lavine, MD
Dr. Nate Green
Medical Director
Cardiovascular Services
Nate Green, MD
Dr. Charlie Jung
Assistant Medical Director
Charlie Jung, MD
Dr. Judith Nielsen
Assistant Medical Director
Specialty Business Processes, Facilities and Quality
Judith Nielsen, MD
Dr. Chris Cable
Assistant Medical Director
Medical/Surgical Specialties
Chris Cable, MD
Dr. Ginny Sugimoto
Assistant Medical Director
Primary Care - Olympia, Puyallup, Tacoma
Ginny Sugimoto, MD