Gastroenterology and Hepatology

The specialty of Gastroenterology and Hepatology diagnoses and treats disorders of the digestive system which is made up of the esophagus, stomach, small intestine, colon, liver, pancreas and biliary system. With advanced technology, an experienced staff, and a complete continuum of services, Summit Pacific offers sensitive, patient-friendly, and understanding care. We are able to treat minors who are age 15 and older who weigh at least 110 pounds or 50 kilograms.

Currently appointments are by referral only, to patients of Summit Pacific’s primary care clinics. If you are a current patient, please make an appointment with your primary care provider to discuss your gastrointestinal concerns by calling 360-346-2222. If needed, your provider can refer you to our Gastroenterology and Hepatology Department who will call you directly to schedule an appointment.

Please call 360-495-5780 for more information, or 360-495-5781 to send a fax.

Learn more about the services provided by Summit Pacific’s Gastroenterology and Hepatology Department.

Gastrointestinal Disorders Treated:

  • Gastroesophageal reflux disease (GERD)
  • Swallowing problems & esophageal motility disorders
  • Barrett’s Esophagus
  • Celiac disease
  • Biliary tract disorders (including gallstones & bile duct problems)
  • Colon cancer screening
  • Colorectal polyps (including removal of large > 2 cm colon polyps)
  • Inflammatory Bowel Disease (Crohn’s disease, ulcerative colitis)
  • Constipation & diarrhea
  • Irritable bowel syndrome
  • Diverticular disease
  • Gastrointestinal bleeding
  • Rectal pain & bleeding
  • Liver disorders
  • Pancreatic disorders

Procedures Available at Summit Pacific

  • Colonoscopy
  • Upper endoscopy
  • Endoscopic mucosal resection (EMR) of large colon polyps
  • Gastrointestinal stricture dilatation
  • Push enteroscopy
  • PEG/PEG placement
  • Capsule endoscopy
  • Liver biopsy
  • Tissue sampling (biopsies throughout the GI tract)

Other Procedures Available through our Outside GI Consultants

(Olympia Gastroenterology Associates, Swedish Medical Center in Seattle, and Virginia-Mason Medical Center in Seattle)
  • Endoscopic Ultrasound
  • Treatment of dysplastic Barrett’s esophagus
  • Specialized esophageal studies (manometry, pH testing)
  • Deep enteroscopy
  • POEM
  • Anorectal manometry

Preparing for your Colonoscopy

It is very important to follow the colonoscopy prep instructions carefully and not skip any steps. Otherwise, you may not be cleaned out adequately, may require additional preparation, and your colonoscopy may need to be rescheduled.

24 Hour Colonoscopy Prep Instructions (click to expand)

48 Hour Colonoscopy Prep Instructions (click to expand)


Patient Educational Materials


GI Resources


Gastroenterology Provider

Mitchell L. Cohen, MD, AGAF, FACG

Dr. Cohen was born and raised in Los Angeles, California before attending the University of California, Los Angeles (UCLA) where he graduated Phi Beta Kappa in 1976 with Special Honors in Chemistry and Biochemistry. While at UCLA, Dr. Cohen spent his junior year abroad as a Foreign Exchange Student at the University of Stirling in Stirling, Scotland in the United Kingdom. He received his Doctor of Medicine degree from the University of Southern California School of Medicine (USC) in 1981. He moved to the San Francisco Bay Area where he completed an Internship and Residency in Internal Medicine at Santa Clara Valley Medical Center which is the Stanford University-affiliated County Teaching Hospital located in San Jose, California. Following this, Dr. Cohen completed a Clinical Gastroenterology Fellowship at the University of New Mexico in Albuquerque, New Mexico. With a strong interest in academic medicine and research, Dr. Cohen subsequently spent nearly five years at Stanford University School of Medicine in Stanford, California. There, he carried out research on the molecular regulation of small intestinal brush border enzymes. He was awarded a Clinical Investigator Award by the National Institutes of Health in Bethesda, Maryland. While at Stanford, Dr. Cohen also held a Clinical Faculty position teaching medical students, Internal Medicine Residents and Gastroenterology Fellows.

In late 1991, Dr. Cohen’s focus turned to private practice medicine. He joined a private practice multispecialty group at Swedish Medical Center in Seattle, Washington. Dr. Cohen served on many hospital committees and eventually became Chief of Gastroenterology for Swedish Medical Center. While practicing in Seattle, he was named by peers and independent research as a Seattle Super Doctor and was voted by peers as one of Seattle’s Top Physicians in Seattle Magazine.

In 2014, Dr. Cohen left practice at Swedish Hospital (though remains Honorary Staff) and joined a private practice group in Central Washington, building a very successful Gastroenterology program in Moses Lake, Washington.

Eager to return to Western Washington, to be closer to his home in Sammamish, Washington, Dr. Cohen now joins Summit Pacific Medical Center as both Gastroenterology and Endoscopy Medical Director, tasked with building a new Gastroenterology program, and as a practicing gastroenterologist.

Dr. Cohen is a Fellow of the American Gastroenterological Association and Fellow of the American College of Gastroenterology. He is a member of the American Society for Gastrointestinal Endoscopy. He is Clinical Instructor of Medicine in the Division of Gastroenterology at the University of Washington School of Medicine in Seattle, Washington.

Outside of the office, Dr. Cohen enjoys time with family, gardening, reading, fine food and computer programming. He has written several programs for Apple’s iPhone and iPad.

Please visit cohengi.info for more information on our gastroenterologist, Dr. Mitchell Cohen, MD, AGAF, FACG.