Our Providers

Our Board-Certified Gastroenterologists are thoroughly trained and highly skilled.

The physicians at Washington Gastroenterology have each completed four years of medical school followed by three years of an Internal Medicine residency. They have also completed at least two to three years of specialty training via fellowship. During fellowship training, physicians learn indications and skills needed to perform specialized diagnostic procedures.

Our staff includes physicians, certified physicians assistants, and advanced nurse practitioners, along with over 400 staff members that are focused on you, the patient.

Abhishek Agarwal, MD - Washington Gastroenterology Provider

Abhishek Agarwal, MD

Education: All India School of Medical Sciences, New Delhi

Residency: University of Arkansas for Medical Sciences

Fellowship: University of Arkansas for Medical Sciences

Locations: Puyallup Clinic, Puyallup Endoscopy Center, Sunrise Clinic, Sunrise Endoscopy Center

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Sanjay Agrawal, MD - Washington Gastroenterology Provider

Sanjay Agrawal, MD

Education: SMS Medical College, India

Residency: State University of New York

Fellowship: University of Massachusetts Medical Center

Locations: Gig Harbor Clinic, Peninsula Endoscopy Center, Tacoma Clinic, Waldron Endoscopy Center

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Harpreet S. Brar, MD - Washington Gastroenterology Provider

Harpreet S. Brar, MD

Education: Spartan Health Science University School of Medicine

Residency: University of Washington

Fellowship: University of Washington

Locations: Olympia Clinic, Gastroenterology Associates Endoscopy Center

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Garrick Brown, MD - Washington Gastroenterology Provider

Garrick Brown, MD

Education: Brigham Young University + University of Tennessee, Health Science Center

Residency: University of Tennessee, Health Science Center

Fellowship: University of Tennessee, Health Science Center

Locations: Gig Harbor Clinic, Peninsula Endoscopy Center

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Raj C. Butani, MD - Washington Gastroenterology Provider

Raj C. Butani, MD

Education: Lehigh University and Medical College of Pennsylvania (Drexel University College of Medicine)

Residency: Brooke Army Medical Center

Fellowship: Brooke Army Medical Center

Locations: Bellevue Clinic, Issaquah Clinic, Eastside Endoscopy Center - Bellevue, Eastside Endoscopy Center - Issaquah

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Mark D. Cumings, MD - Washington Gastroenterology Provider

Mark D. Cumings, MD

Education: Joan C. Edwards School of Medicine at Marshall University

Residency: Tripler Army Medical Center

Fellowship: Walter Reed National Military Medical Center

Locations: Olympia Clinic, Gastroenterology Associates Endoscopy Center

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Charles Donner, MD - Washington Gastroenterology Provider

Charles Donner, MD

Education: University of Heidelbert Medical School, Germany

Residency: University of Illinois, Champaign-Urbana

Fellowship: Stanford University

Locations: Gig Harbor Clinic, Peninsula Endoscopy Center, Tacoma Clinic, Waldron Endoscopy Center

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Walter “Mark” Hassig, MD - Washington Gastroenterology Provider

Walter “Mark” Hassig, MD

Education: University of Michigan, Ann Arbor + Michigan State University

Residency: Blodgett Medical Center, St. Mary's Hospital and Michigan State University

Fellowship: Henry Ford Hospital

Locations: Auburn Clinic, Federal Way Clinic, Fogel Endoscopy Center

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William Holderman, MD - Washington Gastroenterology Provider

William Holderman, MD

Education: University of California, San Diego + Chicago Medical School

Residency: University of Chicago Hospital and Clinics

Fellowship: University of Chicago Hospital and Clinics

Locations: Tacoma Clinic, Waldron Endoscopy Center

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Lin Huang, MD, PhD - Washington Gastroenterology Provider

Lin Huang, MD, PhD

Education: Peking Union Medical College, China + Yale University

Residency: The Cleveland Clinic Foundation

Fellowship: Brigham and Women's Hospital

Locations: Auburn Clinic, Federal Way Clinic, Fogel Endoscopy Center

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Shaily Jain, MD - Washington Gastroenterology Provider

Shaily Jain, MD

Education: Lala Lajpat Rai Memorial Medical College, India

Residency: Southern Illinois University School of Medicine

Fellowship: University of Mississippi Medical Center

Locations: Auburn Clinic, Covington Clinic, Federal Way Clinic, Fogel Endoscopy Center

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Rodney W. Joe, MD - Washington Gastroenterology Provider

Rodney W. Joe, MD

Education: University of Utah School of Medicine

Residency: University of Washington

Fellowship: University of Washington

Locations: Olympia Clinic, Gastroenterology Associates Endoscopy Center

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Kalle Kang, MD - Washington Gastroenterology Provider

Kalle Kang, MD

Education: Massachusetts Institute of Technology + New York University

Residency: University of Michigan

Fellowship: University of Minnesota

Locations: Bellevue Clinic, Issaquah Clinic, Eastside Endoscopy Center - Bellevue, Eastside Endoscopy Center - Issaquah

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Steven Kaptik, MD - Washington Gastroenterology Provider

Steven Kaptik, MD

Education: Boston University + Vanderbilt University

Residency: University of Colorado

Fellowship: University of Tennessee, Memphis

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Ralph Katsman, MD - Washington Gastroenterology Provider

Ralph Katsman, MD

Education: University of Washington

Residency: University of Minnesota

Fellowship: University of Minnesota

Locations: Federal Way Clinic, Fogel Endoscopy Center, Tacoma Clinic, Waldron Endoscopy Center

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Sang U. Kim, MD - Washington Gastroenterology Provider

Sang U. Kim, MD

Education: University of Washington

Residency: University of Washington Medical Center

Fellowship: University of Washington Medical Center

Locations: Bellevue Clinic, Edmonds Clinic, Eastside Endoscopy Center - Bellevue

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Edwin J. Lai, MD - Washington Gastroenterology Provider

Edwin J. Lai, MD

Education: University of Pennsylvania + University of Washington

Residency: Stanford University

Fellowship: Boston University

Locations: Bellevue Clinic, Issaquah Clinic, Eastside Endoscopy Center - Bellevue, Eastside Endoscopy Center - Issaquah

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Michael Lee, MD - Washington Gastroenterology Provider

Michael Lee, MD

Education: Johns Hopkins University

Residency: University of Texas Southwestern Medical Center

Fellowship: University Hospitals Case Medical Center

Locations: Tacoma Clinic, Waldron Endoscopy Center

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Kevin Leung, MD - Washington Gastroenterology Provider

Kevin Leung, MD

Education: University of Illinois, Chicago

Residency: University of Illinois Medical Center, Chicago

Fellowship: University of Texas Medical School, Houston

Locations: Auburn Clinic, Covington Clinic, Federal Way Clinic, Fogel Endoscopy Center

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Rajesh Manam, MD - Washington Gastroenterology Provider

Rajesh Manam, MD

Education: Andhra Medical College, Southern India

Residency: State University of New York Downstate Medical Center

Fellowship: State University of New York Downstate Medical Center

Locations: Puyallup Clinic, Puyallup Endoscopy Center, Sunrise Clinic, Sunrise Endoscopy Center

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Klaus Mergener, MD - Washington Gastroenterology Provider

Klaus Mergener, MD

Education: Medical School in Frankfurt and Heidelberg, Germany

Residency: Duke University Medical Center

Fellowship: Duke University Medical Center

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Benjamin F. Merrifield, MD - Washington Gastroenterology Provider

Benjamin F. Merrifield, MD

Education: Case Western Reserve University School of Medicine

Residency: Brigham and Women's Hospital

Fellowship: Brigham and Women's Hospital / Harvard Medical School

Locations: Olympia Clinic, Gastroenterology Associates Endoscopy Center

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V. Mohan, MD - Washington Gastroenterology Provider

V. Mohan, MD

Education: Maulana Azad Medical College

Residency: Maulana Azad Medical College

Fellowship: Royal College of Physicians

Locations: Bellevue Clinic, Eastside Endoscopy Center - Bellevue

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Oussama Moussan, MD - Washington Gastroenterology Provider

Oussama Moussan, MD

Education: Aleppo University

Residency: Albany Medical College

Fellowship: Albany Medical College

Locations: Puyallup Clinic, Puyallup Endoscopy Center, Sunrise Clinic, Sunrise Endoscopy Center

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Jeremiah Ojeaburu, MD - Washington Gastroenterology Provider

Jeremiah Ojeaburu, MD

Education: University of Ibadan, Nigeria

Residency: University of Connecticut School of Medicine

Fellowship: Georgetown University Hospital + National Institutes of Health

Locations: Puyallup Clinic, Puyallup Endoscopy Center, Sunrise Clinic, Sunrise Endoscopy Center

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David J. Owens, MD - Washington Gastroenterology Provider

David J. Owens, MD

Education: University of Washington

Residency: University of Washington

Fellowship: University of California, San Diego

Locations: Olympia Clinic, Gastroenterology Associates Endoscopy Center

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Georgia Rees-Lui, MD - Washington Gastroenterology Provider

Georgia Rees-Lui, MD

Education: University of Utah

Residency: University of Connecticut

Fellowship: University of Washington

Locations: Bellevue Clinic, Issaquah Clinic, Eastside Endoscopy Center - Bellevue, Eastside Endoscopy Center - Issaquah

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Elizabeth Rosenblatt, MD - Washington Gastroenterology Provider

Elizabeth Rosenblatt, MD

Education: Massachusetts Institute of Technology

Residency: Johns Hopkins University

Fellowship: University of Washington

Locations: Sunrise Clinic, Sunrise Endoscopy Center, Tacoma Clinic, Waldron Endoscopy Center

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Darren Schwartz, MD - Washington Gastroenterology Provider

Darren Schwartz, MD

Education: University of Miami

Residency: University of Miami, Jackson Memorial Hospital

Fellowship: University of Wisconsin Hospital and Clinics

Locations: Gig Harbor Clinic, Peninsula Endoscopy Center, Tacoma Clinic, Waldron Endoscopy Center

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Roanne R.E. Selinger, MD - Washington Gastroenterology Provider

Roanne R.E. Selinger, MD

Education: Princeton University + Vanderbilt University

Residency: University of Washington

Fellowship: University of Washington

Locations: Bellevue Clinic, Issaquah Clinic, Eastside Endoscopy Center - Bellevue, Eastside Endoscopy Center - Issaquah

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Bruce A. Silverman, MD - Washington Gastroenterology Provider

Bruce A. Silverman, MD

Education: Columbia University + Rush Medical College

Residency: Cedars-Sinai Medical Center

Fellowship: University of Washington

Locations: Olympia Clinic, Gastroenterology Associates Endoscopy Center

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Jason Sugar, MD - Washington Gastroenterology Provider

Jason Sugar, MD

Education: University of Iowa + Chicago Pritzker School of Medicine

Residency: University of Colorado, Denver

Fellowship: University of Kansas Hospitals

Locations: Sunrise Clinic, Sunrise Endoscopy Center, Tacoma Clinic, Waldron Endoscopy Center

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Nick Sun, DO - Washington Gastroenterology Provider

Nick Sun, DO

Education: University of California, San Diego

Residency: Saint Michael's Medical Center

Fellowship: Botsford Hospital

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Gary Taubman, MD - Washington Gastroenterology Provider

Gary Taubman, MD

Education: Oregon Health Sciences University

Residency: Oregon Health Sciences University

Fellowship: University of Utah

Locations: Federal Way Clinic, Fogel Endoscopy Center, Tacoma Clinic, Waldron Endoscopy Center

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Shie-Pon Tzung, MD, PhD - Washington Gastroenterology Provider

Shie-Pon Tzung, MD, PhD

Education: National Taiwan University + State University of New York at Buffalo

Residency: Duke University Medical Center

Fellowship: University of Washington

Locations: Bellevue Clinic, Issaquah Clinic, Eastside Endoscopy Center - Bellevue, Eastside Endoscopy Center - Issaquah

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Kathryne A. Wagner, MD - Washington Gastroenterology Provider

Kathryne A. Wagner, MD

Education: University of Washington

Residency: University of New York

Fellowship: University of New York

Locations: Olympia Clinic, Gastroenterology Associates Endoscopy Center, Yelm Clinic

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Nicholas K. Weber, MD - Washington Gastroenterology Provider

Nicholas K. Weber, MD

Education: University of Kentucky

Residency: University of Colorado

Fellowship: Mayo Clinic

Locations: Olympia Clinic, Gastroenterology Associates Endoscopy Center

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Robert A Wohlman, MD - Washington Gastroenterology Provider

Robert A Wohlman, MD

Education: University of Washington

Residency: St. Vincent Hospital and Medical Center

Fellowship: Maricopa Medical Center/Good Samaritan Hospital

Locations: Bellevue Clinic, Eastside Endoscopy Center - Bellevue

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Meimin Xie, MD - Washington Gastroenterology Provider

Meimin Xie, MD

Education: Bejing Medical University / Iowa State University

Residency: Saint Barnabas Medical Center

Fellowship: Brigham and Women's Hospital

Locations: Olympia Clinic, Gastroenterology Associates Endoscopy Center

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Eric Yap, MD - Washington Gastroenterology Provider

Eric Yap, MD

Education: Brown University

Residency: Columbia University Presbyterian Hospital

Fellowship: Stanford University

Locations: Bellevue Clinic, Issaquah Clinic, Eastside Endoscopy Center - Bellevue, Eastside Endoscopy Center - Issaquah

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Kristine Y. Zhang, MD - Washington Gastroenterology Provider

Kristine Y. Zhang, MD

Education: University of Minnesota School of Medicine

Residency: University of Washington

Fellowship: University of Washington

Locations: Olympia Clinic, Gastroenterology Associates Endoscopy Center

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Fassil Belay, PA-C - Washington Gastroenterology Provider

Fassil Belay, PA-C

Education: Central Texas College + University of Washington

Locations: Puyallup Clinic, Sunrise Clinic

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Jessica Bhavsar, PA-C - Washington Gastroenterology Provider

Jessica Bhavsar, PA-C

Education: University of South Carolina + Medical University of South Carolina, Charleston

Locations: Auburn Clinic, Covington Clinic, Federal Way Clinic

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Kimberly Jannison-Darcey, PA-C - Washington Gastroenterology Provider

Kimberly Jannison-Darcey, PA-C

Education: Washington State University / Saint Louis University

Locations: Gig Harbor Clinic, Tacoma Clinic

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Patti Lightfoot, PA-C - Washington Gastroenterology Provider

Patti Lightfoot, PA-C

Education: Oregon Health Sciences University School of Medicine

Locations: Bellevue Clinic

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Victoria M. Moore, PA-C - Washington Gastroenterology Provider

Victoria M. Moore, PA-C

Education: San Francisco University + University of Washington

Locations: Olympia Clinic

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Albert Morriss, PA-C - Washington Gastroenterology Provider

Albert Morriss, PA-C

Education: Texas Tech University

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Kathryn Pierce, PA-C - Washington Gastroenterology Provider

Kathryn Pierce, PA-C

Education: Massachusetts College of Pharmacy and Health Science University

Locations: Auburn Clinic, Covington Clinic, Federal Way Clinic

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Jason A. Rodgers, PA-C - Washington Gastroenterology Provider

Jason A. Rodgers, PA-C

Education: University of Nevada at Las Vegas

Locations: Tacoma Clinic

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Melissa Sharp, PA-C - Washington Gastroenterology Provider

Melissa Sharp, PA-C

Education: Walla Walla College + Loma Linda University

Locations: Tacoma Clinic

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Laura Sokoloski, PA-C - Washington Gastroenterology Provider

Laura Sokoloski, PA-C

Education: State University of New York, Stony Brook

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Zachary Sullivan, PA-C - Washington Gastroenterology Provider

Zachary Sullivan, PA-C

Education: Drexel University + Western Washington University

Locations: Sunrise Clinic

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Janelisa Williams, PA-C - Washington Gastroenterology Provider

Janelisa Williams, PA-C

Education: University of Washington

Locations: Olympia Clinic

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Patrick C. Williams, PA-C - Washington Gastroenterology Provider

Patrick C. Williams, PA-C

Education: University of Nebraska Medical Center

Locations: Olympia Clinic

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Janet Caragan, ARNP - Washington Gastroenterology Provider

Janet Caragan, ARNP

Education: University of South Florida, Tampa

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Audrey Desilet, ARNP - Washington Gastroenterology Provider

Audrey Desilet, ARNP

Education: Chamberlain College of Nursing + University of Arizona

Locations: Tacoma Clinic

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Olga Fedyuk, ARNP - Washington Gastroenterology Provider

Olga Fedyuk, ARNP

Education: Highline Community College + University of Washington

Locations: Puyallup Clinic

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Connie Godjikian, ARNP - Washington Gastroenterology Provider

Connie Godjikian, ARNP

Education: Oregon Health and Science University + Rivier College

Locations: Auburn Clinic, Covington Clinic, Federal Way Clinic

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Dorothy Gonzaga, ARNP - Washington Gastroenterology Provider

Dorothy Gonzaga, ARNP

Education: University of the Philippines Institute of Public Health + Fatima College

Locations: Tacoma Clinic

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Michelle Hendrickx, ARNP, MSN, ND - Washington Gastroenterology Provider

Michelle Hendrickx, ARNP, MSN, ND

Education: Occidental College + Case Western Reserve University

Locations: Tacoma Clinic

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Stephanie F. Mitchell, ARNP - Washington Gastroenterology Provider

Stephanie F. Mitchell, ARNP

Education: University of Portland + Regis College

Locations: Olympia Clinic

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Sarah B. Poppe, ARNP - Washington Gastroenterology Provider

Sarah B. Poppe, ARNP

Education: University of Kansas + University of Cincinnati

Locations: Olympia Clinic

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Karen Shively, MSN, ARNP - Washington Gastroenterology Provider

Karen Shively, MSN, ARNP

Education: Seattle University

Locations: Auburn Clinic, Covington Clinic, Federal Way Clinic

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Kimberly Thomas, MS, ARNP, NP-C - Washington Gastroenterology Provider

Kimberly Thomas, MS, ARNP, NP-C

Education: University of New Hampshire

Locations: Olympia Clinic

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Adrienne E. Wasserman, ARNP - Washington Gastroenterology Provider

Adrienne E. Wasserman, ARNP

Education: Dickinson College, Thomas Jefferson University, University of Pennsylvania

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Betty White, ARNP, MN - Washington Gastroenterology Provider

Betty White, ARNP, MN

Education: University of Washington

Locations: Tacoma Clinic

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