Meet Our Doctors

Read Below to Learn More about Dr. Neil Roberts, MD and Dr. Sam Hong, MD

Get Quality Care From a Dedicated Medical Team

Choose us for gastrointestinal care in Oklahoma City, OK

When you're experiencing health problems, you don't want to be treated like just another number. Visit Greater OKC Gastroenterology Associates for gastrointestinal care, and you can rest assured that our medical staff will listen to your problems and work with you to find gastrointestinal treatments that work for you.

We make it our mission to find the cause of your symptoms as quickly and painlessly as possible. Once your health concerns are understood, we'll use the least complicated strategies to resolve your symptoms. Call our gastrointestinal care center in Oklahoma City, OK for more information.

Dr. Neil Roberts


Medical School: University of Oklahoma College of Medicine
Residency: Internal Medicine - University of Alabama at Birmingham
Fellowship: Gastroenterology - University of Oklahoma Health Sciences Center
Board Certifications: Gastroenterology – American Board of Internal Medicine

Having completed his fellowship in 2009, Dr. Neil Roberts has over a decade of experience in gastroenterology. He is committed to continual education in new gastrointestinal treatments and techniques and will put his knowledge to work to resolve your symptoms. Dr. Roberts went into private practice to focus on providing better, smarter care. With the freedom to focus on providing quality care, he will make every effort to find a treatment plan that works for your needs and budget.

Dr. Sam Hong


Medical School: Vanderbilt University
Residency: Internal Medicine - Washington University
Fellowship: Vanderbilt University - Thomas Jefferson Memorial Hospital
Board Certifications: Internal Medicine - American Board of Internal Medicine & Gastroenterology - American Board of Internal Medicine 

Allison Duncan


Allison Duncan is an Oklahoma native with roots in the Ada region. She completed her Bachelors of Science in Nursing at East Central University in Ada. Thereafter, she completed her Masters of Nursing and Family Nurse Practitioner program through Indiana State University in 2009. She has a variety of exposures and experience including Pain Management, Women's Health, Urgent Care, Trauma Surgery, and Gastroenterology. She worked with another Gastroenterology group in Oklahoma City for approximately three years before joining Greater OKC Gastroenterology in January of 2018.