Meet Our Doctors

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

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

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.