Lew Ronald

Ronald J Lew, MD


  • Specialty: Gastroenterology
  • Clinical Interests: Biliary Disease, Colon Cancer Screening, Colonoscopy, Endoscopic Ultrasound, Therapeutic Endoscopic Retrograde Cholangiopancreatography, Esophageal Disease, Esophageal Motility, Gastrointestinal Malignancies, Hepatitis, Inflammatory Bowel Disease, Liver Disease, Pancreatic Disease
  • Languages: English, Spanish, Interpreters Available
  • Gender: Male


Dr. Lew completed his undergraduate degree in molecular and cell biology at the University of California at Berkeley and received his medical degree from New York University School of Medicine. He completed an internal medicine residency at Harbor-UCLA Medical Center in Southern California. Dr. Lew completed his gastroenterology fellowship training at the University of Pennsylvania in Philadelphia and spent an additional year specializing in therapeutic pancreaticobiliary endoscopy and endoscopic ultrasound. He joined Gastroenterology Specialists of Oregon in 2002.

Dr. Lew has special interest in gastrointestinal oncology, with particular focus on pancreatic, biliary, and esophageal cancer. He serves on the Tumor Board at both Legacy Meridian Park Hospital and Willamette Falls Hospital.

Education and Certification

  • Undergraduate: University of California - Berkeley, CA
  • Medical School: New York University School of Medicine
  • Residency: Harbor UCLA Medical Center
  • Internship: Harbor UCLA Medical Center
  • Fellowship: University of Pennsylvania

Personal Interests

Mountain Biking, Camping, Alpine Skiing, Spending time with family

Contact Information

  • Practice Name: Gastroenterology Specialists of Oregon

Office Locations

  1. Primary Address
    Gastroenterology Specialists of Oregon
    • 19250 SW 90th
    • Tualatin, OR, 97062
    • Phone: 503 692-3750
    • Fax: 503 691-2324
  2. Secondary Address
    Gastroenterology Specialists of Oregon
    • 1508 Division St Ste 15
    • Oregon City, OR, 97045
    • Phone: 503-692-3750
    • Fax: 503 657-6502

Hospital Locations

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