Gastroenterology West at SW Barnes Road





About
At The Oregon Clinic Gastroenterology West, our experienced, board-certified physicians are committed to quality care in all aspects of gastroenterology and hepatology.
Our doctors are trained in advanced therapeutic and diagnostic procedures and are able to treat a wide variety of conditions.
Advanced technology, including Spyglass Endoscopy and Balloon Enteroscopy, allow for early detection of disease and prevention of unnecessary surgeries.
Thanks to our state-of-the-art outpatient endoscopy center and our close proximity to Providence St. Vincent’s Medical Center, we are able to offer our patients cutting edge diagnostic and therapeutic procedures in a comfortable and reassuring environment. We use safe and up-to-date sedation techniques.
We specialize in colon cancer screening that uses the gentlest bowel preparation and the most effective sedation medications.
Since November 2014, each of our three gastroenterology groups has been participating in the GI Quality Improvement Consortium (GIQuIC) program. Being part of this organization requires a focus on enhancing patient care through real-time peer-based performance evaluation. Click to read more on the GIQuIC website.

Endoscopy Center Ownership
Sergio Crespo, MD
Glenn Eisen, MD
David Grunkemeier, MD
Margot Herman, MD
Brent Lee, MD
Shannon Lewis, MD
Sarah "Betsy" Rodriguez, MD
Karen Saks, MD
Douglas Shumaker, MD
Adam Silverblatt, MD
Cristian Vallejos, MD
Amy Wang, MD
Jeffrey Weprin, MD
Diane Williams, DO
Team
- Colon Cancer Screening & Prevention
- Gastroesophageal Reflux Disease (GERD)
- Esophageal Disorders
- Inflammatory Bowel Disease (IBD)
- Irritable Bowel Syndrome (IBS)
- Inflammatory Bowel Disease (IBD)
- Hepatobiliary Disease
- Gastroesophageal Reflux Disease (GERD)
- Irritable Bowel Syndrome (IBS)
- General Gastroenterology
- Liver Disease
- Viral Hepatitis
- Colon Cancer Screening & Prevention
- Acid Reflux
- Colon Cancer Screening & Prevention
- Disease of the Liver & Biliary Tract
- Hepatology
- Gastroesophageal Reflux Disease (GERD)
- Inflammatory Bowel Disease (IBD)
- Gastroesophageal Reflux Disease (GERD)
- Colon Cancer Screening & Prevention
- Barrett's Ablation
- Inflammatory Bowel Disease (IBD)
- Capsule Endoscopy
- Therapeutic Endoscopy
- Pancreas & Bile Duct Disorders
- Pancreatic Cancer
- Bile Duct Stones & Strictures
- Barrett's Esophagus & Esophageal Cancer
- Advanced Inflammatory Bowel Disease (IBD)
- Colorectal Cancer
- Hepatology & Liver Disease
- Celiac Disease
- Research
- Advanced Inflammatory Bowel Disease (IBD)
- Colon Cancer Screening & Prevention
- Celiac Disease
- Irritable Bowel Syndrome (IBS)
- Motility Disorders
- Gastroesophageal Reflux Disease (GERD)
- Inflammatory Bowel Disease (IBD)
- Colon Cancer Screening & Prevention
- Irritable Bowel Syndrome (IBS)
- Colon Cancer Screening and Prevention
- Endoscopic Retrograde Cholangiopancreatography (ERCP)
- Endoscopic Ultrasound (EUS)
- Gastroesophageal Reflux Disease (GERD)
- Gastrointestinal Oncology
- Celiac Disease
- Colon Cancer Screening & Prevention
- Gastroesophageal Reflux Disease (GERD)
- Inflammatory Bowel Disease (IBD)
- Irritable Bowel Syndrome (IBS)
- Celiac Disease
- Colon Cancer Screening & Prevention
- Gastroesophageal Reflux Disease (GERD)
- Gastrointestinal Motility Disorders
- Inflammatory Bowel Disease (IBD)
- Gastroenterology
- Hepatology
- Inflammatory Bowel Disease (IBD)
- Irritable Bowel Syndrome (IBS)
- Inflammatory Bowel Disease (IBD)
- Intuitive Eating
- Low-FODMAP Diet
- Small Intestinal Bacterial Overgrowth (SIBO)
- Pancreas & Biliary Disease
- Gastroesophageal Reflux Disease (GERD)
- Colon Cancer Screening & Prevention
- General Gastroenterology
- Endoscopic Ultrasound (EUS)
- Esophageal Motility
- Gastroesophageal Reflux Disease (GERD)
- Inflammatory Bowel Disease (IBD)
- Colon Cancer Screening
- Colon Cancer Screening & Prevention
- Endoscopic Retrograde Cholangiopancreatography (ERCP)
- Endoscopic Ultrasound (EUS)
- General Gastroenterology
- Pancreatobiliary Disease
- Colon Cancer Screening & Prevention
- Inflammatory Bowel Disease (IBD)
- Endoscopic Retrograde Cholangiopancreatography (ERCP)
- Colonoscopy
- Celiac Disease
- Acute & Chronic Liver Disease
- Colon Cancer Screening & Prevention
- Inflammatory Bowel Disease (IBD)
- Internal Hemorrhoid Ligation
- Colon Cancer Screening & Prevention
- Inflammatory Bowel Disease (IBD)
- Gastroesophageal Reflux Disease (GERD)
- Irritable Bowel Syndrome (IBS)
- Celiac Disease
- Inflammatory Bowel Disease (IBD)
- Colon Cancer Screening & Prevention
- Gastroesophageal Reflux Disease (GERD)
- General Gastroenterology
- Inflammatory Bowel Disease (IBD)
- Celiac Disease
- Colon Cancer Screening & Prevention
- Esophageal Disorders
- Esophageal Manometry
- Colorectal Cancer
- Acid Reflux
- Inflammatory Bowel Disease (IBD)
- Irritable Bowel Syndrome (IBS)
- Intestinal Bleeding
Services & Procedures
Our providers use a variety of procedures to help heal and prevent cancer including:
Endoscopic Retrograde Cholangio Pancreatography (ERCP)
We also provide a full spectrum of GI services and treat many conditions including:
Collagenous Colitis & Lymphocytic Colitis
Diverticulosis and Diverticulitis
Gastroesophageal Reflux Disease (GERD)
Inflammatory Bowel Disease (IBD)
Irritable Bowel Syndrome (IBS)
Peptic Ulcers and Non-Ulcer Dyspepsia
Prevention of Colon Polyps & Cancer
Forms
We encourage all patients to complete check-in forms before their appointment.
If you are registered with InteliChart PatientPortal, you will:
- Receive a link to your check-in forms by email about 14 days before your visit
- Complete and submit your forms before your appointment
If you are not registered with InteliChart PatientPortal:
- Call your clinic to sign up for the portal
- The office will text or email you a secure link to the portal
If you are unable to complete the forms online before your appointment, please plan to arrive early to complete your forms in the waiting area before your visit.
If you have questions about check-in forms, please call the office where your appointment is scheduled.
Directions
Location
Peterkort Centre
9701 SW Barnes Rd, Portland, OR 97225
Parking
- Follow signs to Peterkort Centre.
- Free parking is available in front of the building.
- Additional parking is available in the parking garage to the left of the building.
Getting to the Office
- Enter the Peterkort Medical Office.
- Take the elevator to the 3rd floor.
- Follow signs to Suite 300
Preps
- Clear Liquid Diet
- Informed Consent for Anesthesia
- Informed Consent for GI Endoscopy
- Frequently Asked Questions (Endoscopy Procedure)
Colonoscopy Prep
- Helpful Tips for Preparing for a Colonoscopy
- Colyte Prep
- Colyte-2 Day Chronic Constipation Prep
- Colyte-3 Day Chronic Constipation Prep
- Colyte with Extra Half Day Clears
- Colyte with Magnesium Citrate
- MiraLAX Prep
- MiraLAX-2 Day Chronic Constipation Prep
- MoviPrep
- Suprep
- Suprep- 2 Day Prep
- Suprep- 2 Day Prep with Magnesium Citrate
- Diabetic Diet/Medication Instructions (Colonoscopy)
- FAQs (Colonoscopy)
- Blood Thinning Agents
Upper Endoscopy Prep (EGD, ERCP, Upper Endoscopic US)
- Upper Endoscopy Prep
- Diabetic Diet/Medication Instructions (Upper Endoscopy)
- FAQ (Upper Endoscopy)
- Blood Thinning Agents
Lower Endoscopy (Flex Sig, Lower Endoscopy US)
- Sedated Lower Endoscopy Prep
- Unsedated Lower Endoscopy Prep
- Diabetic Diet/Medication Instructions (Lower Endoscopy)
- FAQ (Lower Endoscopy)
- FAQs (Lower Endoscopy with colon prep)
- Blood Thinning Agents
Esophageal Manometry and pH Impedance
- 24 Hour pH Impedance Study while on PPI
- 24 Hour pH Impedance Study while off PPI
- Esophageal Manometry Study
- Esophageal Manometry & 24 Hour Impedance Study on PPI
- Esophageal Manometry & 24 Hour Impedance Study off PPI
Additional Information For All Procedures
- Advanced Directive Information
- Billing Information
- Patient Rights and Responsibilities
- Audio Version of Patient Rights and Responsibilities (opens new window)
- Download all additional information at once