About Steven T. Lewis, MD

Dr. Lewis is the clinical leader of Washington working in collaboration with the Division Vice President to provide strategic and operational support for clinicians and care centers. Additionally, he provides physician leadership in clinical governance, compliance, credentialing, and business development.

Dr. Lewis' professional interests include colon cancer screening and prevention, Gastroesophageal Reflux Disease (GERD), Inflammatory Bowel Disease, and general gastroenterology.

Conditions & Procedures

  • Abdominal Pain
  • Acid Reflux & GERD
  • Anal Fistulas
  • Anemia
  • Barrett's Esophagus
  • Colitis
  • Colon Diseases & Polyps
  • Colorectal (Colon) Cancer
  • Constipation
  • Crohn’s & Ulcerative Colitis
  • Diarrhea
  • Diverticulitis
  • Dyspepsia
  • Dysphagia
  • Gastritis
  • Hemorrhoids
  • Hepatitis
  • Indigestion
  • Inflammatory Bowel Disease
  • Irritable Bowel Syndrome
  • Peptic Ulcer Disease
  • Colonoscopy (Screening & Diagnostic)
  • EGD (Upper Endoscopy)

Office Locations

Primary Location

Picture of the Seattle - Fremont Office

Seattle - Fremont

501 N. 34th St.
Suite 101
Seattle, WA 98103

Phone: 206-838-1777
Fax: 206-838-1771

Additional Locations

Seattle - Northgate

11027 Meridian Ave. N
Suite 100
Seattle, WA 98133

Phone: 206-365-4492
Fax: 206-368-3456


Procedure Locations

Having a procedure? It may not always be in the same location where you consulted with your doctor. Check with your doctor to make sure you’re headed to the right place.


  • Aetna - WA
  • Medicare - WA
  • Medicare Railroad - WA
  • Premera - WA



UCLA School of Medicine


University of Rochester, School of Medicine


University of Rochester, School of Medicine


University of California, San Diego, School of Medicine

Professional Highlights


Board Certified in Internal Medicine

Board Certified in Gastroenterology