Douglass Jeffrey

Jeffrey M Douglass, MD


  • Specialty: Gastroenterology
  • Clinical Interests: Acid Reflux-Barrett's Esophagus, Biliary Disease, Celiac Sprue, Colon Cancer Screening, Colonoscopy, Therapeutic Endoscopic Retrograde Cholangiopancreatography, Esophageal Disease, Esophageal Motility, Hepatitis, Inflammatory Bowel Disease, Liver Disease, Pancreatic Disease, Video Capsule Endoscopy
  • Languages: English, Interpreters Available
  • Gender: Male


Dr. Douglass was raised in southwest Portland and received his undergraduate degree in biology at Pacific Lutheran University. He earned his medical degree at Oregon Health & Science University (OHSU), where he also completed an internal medicine internship and residency. He completed a three-year gastroenterology fellowship at the University of New Mexico, Albuquerque.

Before joining Gastroenterology Specialists of Oregon, Dr. Douglass conducted research on ethnicity and hepatitis C cure rates with Pegylated Interferon and Ribavirin. He also conducted an analysis of endoscopy for iron deficiency anemia.

When away from the office Dr Douglass enjoys spending time with his wife and five children.

Education and Certification

  • Medical School: Oregon Health & Science University
  • Residency: Oregon Health & Science University
  • Internship: Oregon Health & Science University
  • Fellowship: University of New Mexico School of Medicine - Albuquerque, NM

Personal Interests

Spending time with family, Fly-fishing

Contact Information

  • Practice Name: Gastroenterology Specialists of Oregon

Office Locations

  1. Primary Address
    Gastroenterology Specialists of Oregon
    • 19250 SW 90th Ave
    • Tualatin, OR, 97062
    • Phone: 503 692-3750
    • Fax: 503 691-2324
    • Clinic Hours:
    • Weekdays
  2. Secondary Address
    GI Specialists of Oregon-Providence Newberg MOB
    • 1003 Providence Dr Ste 315
    • Newberg, OR, 97132
    • Phone: 503-692-3750
    • Fax: 503 691-2324

Hospital Locations

  1. Primary Address
    Legacy Meridian Park Medical Center
    • 19300 SW 65th Avenue
    • Tualatin, Oregon, 97062
    • Phone: 503-692-1212