Providers

Sumit Ahluwalia, M.D.

 Sumit Ahluwalia, M.D.

Dr. Sumit Ahluwalia is board certified in both Gastroenterology and Internal Medicine. Dr. Ahluwalia is a native of Oklahoma City, Oklahoma and obtained his medical degree from the University of Oklahoma College of Medicine. He completed his residency in Internal Medicine at Temple University Hospital in Philadelphia and fellowship training in Gastroenterology at the University of Oklahoma Health Sciences Center.

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Larry A. Bookman, M.D.

As a gastroenterologist, Dr. Bookman is board certified in Internal Medicine and has completed extensive training in the diagnosis and treatment of disorders of the esophagus, stomach, small intestine, colon, liver, and gallbladder. He has been in private practice since 1982 and in 1994 was a founding partner of Digestive Disease Specialists.
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 Misty Chaney, APRN-CNP

Misty Chaney, APRN-CNP is Board Certified as an Adult Nurse Practitioner by the American Academy of Nurse Practitioners. She began her career in health care in 1994 as a Certified Nursing Assistant at the age of 18. In 1997, she received her Registered Nurse degree. In 2004, she graduated from the University of Texas at Arlington with her Masters of Science in Nursing. She completed her Post Masters certificate as a Family Nurse Practitioner from the University of Massachusetts – Boston in 2013. 
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Neil Crittenden, M.D.

Dr. Neil Crittenden is board certified in both Gastroenterology and Internal Medicine and was born and raised in Oklahoma City.  He has advanced training in colonoscopy and endoscopic mucosal resection of colon polyps. His specialties include colon cancer risk assessment and prevention, diagnosing and treating indigestion, swallowing difficulty, heart burn, acid reflux, bloating, abdominal pain, Crohn’s Disease, ulcerative colitis, irritable bowel syndrome, inherited genetic cancer syndromes, liver disease including cirrhosis, chronic hepatitis B and C viral infections.  
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Allison Goree, APRN-CNP

 Allison Goree, APRN-CNP

Allison Goree was born in Ada, Oklahoma, and graduated from East Central University with a Bachelor of Science degree in Nursing. She obtained a Master of Science in Nursing degree with a concentration in Nurse Practitioner of Family Practice from Indiana State University in 2009. She is certified as an Advanced Practice Registered Nurse by the State of Oklahoma Board of Nursing and holds board certification as a Family Nurse Practitioner from the American Academy of Nurse Practitioners.
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Ross S. Keener, M.D.

Dr. Keener is Board Certified in both Internal Medicine and Gastroenterology. He has completed extensive training in the diagnosis and treatment of disorders of the esophagus, stomach, small intestine, colon, liver and gallbladder. He has been in private practice since 2003 and associated with Digestive Disease Specialists, Inc. since 2003.
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Matthew A. McBride, M.D.

Dr. McBride has maintained a very popular Gastroenterology practice in Oklahoma City for over 20 years, and specializes in all types of standard and advanced endoscopy as well as disorders of the esophagus, stomach, biliary tract and colon. He has specialized training in Advanced Therapeutic Endoscopy.  His particular interests include inflammatory bowel disease, GERD, and colon and esophageal cancer prevention.

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Sikandar A. Mesiya, M.D.

Dr. Mesiya received his medical degree from Dow Medical College in Karachi, Pakistan. He completed his residency at St. Louis University Hospital in St. Louis, Missouri and his clinical Fellowship at the University of Oklahoma Health Sciences Center in Oklahoma City, Oklahoma.
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David A. Neumann II, M.D.

Dr. David A. Neumann II is board certified in both Internal Medicine and Gastroenterology. Dr. Neumann II earned his bachelor’s degree and medical degree from the University of Oklahoma. He completed his Internal Medicine Residency at the Mayo Clinic in Rochester, MN and his Gastroenterology Fellowship at Beaumont Hospital in Royal Oak, MI.
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BaoLong Nguyen, M.D.

Dr. Nguyen received his medical degree from the University of Nebraska in Omaha, Nebraska. He completed his Residency in Internal Medicine at Creighton University Medical Center in Omaha, Nebraska, and his Clinical Fellowship at the University of Nebraska Medical Center in Omaha, Nebraska.
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Son H. Nguyen, M.D.

Dr. Son Nguyen is a native of Midwest City, Oklahoma and obtained his medical degree from the University of Oklahoma. He is board certified in Both Internal Medicine and Gastroenterology. He has had extensive training in the diagnosis and treatment of disorders of the Esophagus, Stomach, Small Intestine, Colon, Liver and Gallbladder.
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Carl A. Raczkowski, M.D.

Dr. Raczkowski is board certified in both Internal Medicine and Gastroenterology and has completed extensive training in the diagnosis and treatment of disorders of the esophagus, stomach, small intestine, colon, liver and gallbladder. He has been in private practice with Digestive Disease Specialists, Inc., since 1997 and is President of Integris Health Partners.
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Syed Rizvi, M.D.

Dr.Syed Rizvi is a graduate of the University of Oklahoma with Fellowships in Gastroenterology and Hepatology. He has also completed an additional fellowship in Transplant Hepatology. Dr. Rizvi has been an Assistant Professor in Digestive Diseases at the OU School of Medicine and the VA hospital in Oklahoma City.
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Jeffery Scott, M.D.

Jeffery Scott, M.D.

Dr. Jeffery Scott is board certified in Gastroenterology and has completed extensive training in the diagnosis and treatment of disorders of the esophagus, stomach, small intestine, colon, liver and gallbladder. He has been in private practice since 1995 in Stillwater, Oklahoma, and joined Digestive Disease Specialists, Inc. in January 2016.
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Kenneth Seres, M.D.

Dr. Seres is board certified in gastroenterology and is a graduate of the University of Oklahoma College of Medicine. He completed his residency training in Internal Medicine at the OU Medical Center/University of Oklahoma College of Medicine, where he served as Chief Resident. He completed additional fellowship training in Gastroenterology at OU Medical Center/University of Oklahoma College of Medicine.
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David S. Stokesberry, M.D.

Dr. Stokesberry is board certified in both Internal Medicine and Gastroenterology. He has completed extensive training in the diagnosis and treatment of disorders of the esophagus, stomach, small intestine, colon, liver, and gallbladder.
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Verapan Vongthavaravat, M.D.

Dr. Vong received his medical degree from Thailand. He completed his residency in Internal Medicine from MetroWest Medical Center in Massachusetts and his Gastroenterology fellowship training at the OU Health Sciences Center.
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Clinton G. Wallis, M.D.

Dr. Wallis is board certified in both Internal Medicine and Gastroenterology and has completed extensive training in the diagnosis and treatment of disorders of the esophagus, stomach, small intestine, colon, liver and gallbladder. He has been in private practice since 2006 with Digestive Disease Specialists, Inc.
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