Summary

Dr. John Walker is a gastroenterologist with over five decades of medical experience, having practiced for 53 years. He earned his medical degree from the University of Texas Southwestern Medical School in Dallas and completed his internal medicine residency training at Jackson Memorial Hospital/Jackson Health, Medical College of Wisconsin Affiliated Hospitals Program, and Miami Affiliated Hospitals. Dr. Walker is board certified in internal medicine through the American Board of Internal Medicine. He speaks English fluently.

Dr. Walker practices at Centennial Gastroenterology Associates in Roseburg, Oregon, and maintains hospital affiliations with Mercy Medical Center, Saint Charles Bend, and Providence Medford Medical Center. He specializes in treating digestive conditions such as colon polyps, diarrhea, and acid reflux. His procedural expertise includes performing pathology tests, kidney transplant biopsies, and nerve biopsies. Patients have given him an average rating of 2.3 out of 5 on Vitals.
Read More Read less

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 2.3
  • 53 years of experience
  • speaks English
  • Jackson Mem Hosp/Jackson Hlth, Internal Medicine
  • 2 written reviews
  • 1 specialty
  • 10 areas of expertise
  • 2 board certifications
  • 3 hospital affiliations
  • 1 office location
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis

Office Location

Centennial Gastroenterology Associates

2510 NW Edenbower Blvd Suite 112Roseburg, OR 97471
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Compare with Similar Doctors

John Walker, MD
Surinder Vasdev, MD
Dr. Chakri Panjala
Dr. Rodolfo Bunanig Lorenzo
John Walker, MDSurinder Vasdev, MDDr. Chakri PanjalaDr. Rodolfo Bunanig Lorenzo
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients
2.3 
4.2 
53 Years of Experience 42 Years of Experience 33 Years of Experience 61 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English Speaks English Speaks English
Roseburg , ORRoseburg , ORRoseburg , ORROSEBURG , OR
Med School: University of Texas Southwestern Medical School, Dallas Med School: University of London, The Middlesex Hosp Med Sch Med School: Gandhi Medical College Secunderabad Med School: University Of The Philippines Manila College Of Medicine
Current Profile
View Profile View Profile View Profile

Insurance Plans Accepted by John Walker

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

John Walker has the following specialty

Specialty Expertise

John Walker has the following 10 areas of expertise

  • Abdominal Pain
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Acid Reflux Disease (GERD)
  • Celiac Disease
  • Colonoscopy
  • Constipation
  • Hemorrhoids
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Certifications, License, & Education

53 Years Experience

John Walker holds an expired medical license in the state of Oregon. They are board certified in Internal medicine by the American Board of Internal Medicine.

Board Certifications

Board certified in Internal medicine by the American Board of Internal Medicine.

Medical License

Medical Doctor with an expired medical license in the state of Oregon that expired in 2025.

Education & Training

Residency

Completed their residency at Jackson Mem Hosp/Jackson Hlth, Internal Medicine, Medical College of Wisconsin Affiliated Hospitals Program, and Miami Affil Hosps in 1974.

Medical School

Graduated from University of Texas Southwestern Medical School, Dallas in 1973.

NPI Number

John Walker's NPI number is 1346210994.

Similar doctors

Frequently Asked Questions

Does John Walker accept virtual/telehealth appointments?
John Walker has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Which hospitals is John Walker affiliated with?
John Walker is affiliated with Mercy Medical Center, Saint Charles Bend, and Providence Medford Medical Center.
Does John Walker accept my insurance?
You can see the insurance plans that John Walker accepts on their Vitals profile.
Where is John Walker's office located?
John Walker's office is located at 2510 NW Edenbower Blvd Suite 112, Roseburg, OR, 97471.
What languages does John Walker speak?
John Walker speaks English.

Ensuring Data Transparency and Trust: A Guide to Vitals Doctor Listings and Reviews

Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.

Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.

Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.