scroll to top of page

Our Team

Meet Our Gastroenterologists

The physicians, nurse practitioner and administrative professionals at Oak Ridge Gastroenterology Associates are committed to providing you with excellent care. We’re all partners in your care, and we believe that is what has helped shape our reputation as a leading provider of gastroenterology in East Tennessee. Thank you for giving us the opportunity to tell you a little more about our team.

More than 60 years combined experience! 

Our physicians are experts in the management of diseases of the gastrointestinal tract – the stomach, intestines, esophagus, liver, pancreas, colon and rectum.

They earned their medical degree after four years of training in a variety of clinical settings, completing core rotations, and passing the United States Medical Licensing Exam. They then went on to complete a three year residency and a two to four year fellowship to get hands on experience with patients and become familiar with the setting and team that is involved with patient care. 

Patient Referrals

Click here for referral information for our physicians.


Our Physicians

Ravi Ghanta, MD
Ravi Ghanta, MD

Ravi Ghanta, MD

In practice since 2013

Residency

Internal Medicine – Government Hospital, 1999

Fellowship

Gastroenterology – Jackson Memorial Hospital, 2013

Board Certifications

Gastroenterology, Internal Medicine, 2013


Venkata C. Gourineni, MD

Venkata C. Gourineni, MD
Venkata C. Gourineni, MD

In practice since 2016

Clinical Interests

  • General gastroenterology
  • Colon cancer screening
  • Diagnostic and therapeutic endoscopy
  • Liver, gallbladder, and biliary diseases
  • Cirrhosis and complications management

Residency

Internal Medicine – Bridgeport Hospital in a liation with Yale University School of Medicine, 2013

Fellowship

Gastroenterology and Hepatology – Bridgeport Hospital in a liation with Yale University School of Medicine, 2016

Professional Memberships

  • Member of Royal College of Physicians, London 
  • American College of Gastroenterology 
  • American Gastroenterological Association 
  • American Society for Gastrointestinal Endoscopy

Allison Locke, MD

Allison Locke, MD of Oak Ridge Gastroenterology Associates
Allison Locke, MD

In practice 2018

Clinical Interests

  • General gastroenterology
  • Liver cirrhosis
  • Colorectal cancer screening

Medical School

East Tennessee State University
Quillen College of Medicine, 2011

Residency

Internal Medicine,
East Tennessee State University
Quillen College of Medicine, 2014

Fellowship

Gastroenterology,
East Tennessee State University
Quillen College of Medicine, 2018

Professional Membership

Member of  American Gastroenterological Association


Charles Orton, MD

Charles Orton, MD
Charles Orton, MD

In practice since 2016

Clinical Interests

  • Esophageal disorders
  • Peptic ulcer disease
  • Celiac disease
  • Pancreatitis
  • Colon cancer screening

Residency

Internal Medicine – University of Virginia, 2013

Fellowship

Gastroenterology – University of Virginia, 2016

Professional Memberships

  • Member of Alpha Omega Alpha
  • Member of American College of Physicians
  • Member of American Medical Association
  • Member of American College of Gastroenterology
  • Member of American Society for Gastrointestinal Endoscopy

Ronald Wray, MD

Ronald Wray, MD
Ronald Wray, MD

In practice since 1992

Advanced Procedural Skills

  • ERCP
  • Balloon Enteroscopy
  • Capsule Endoscopy

Residency

Internal Medicine – The Mayo Clinic, 1990

Fellowship

Gastroenterology – Vanderbilit University, 1992

Board Certifications

Internal Medicine and Gastroenterology