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Castor, John M., MD

Dr. John Castor joined Ohio Gastroenterology Group in 2011. He earned his medical degree from Case Western Reserve University in Cleveland, Ohio. He completed his residency and fellowship at Duke University. Dr. Castor has a special interest in the diagnosis and treatment of esophageal disorders. He is the group’s principal investigator for several research studies related to esophageal disorders.

Primary Practice Location:

Westerville Office:
430 Altair Parkway, Suite 110
Westerville, OH 43082

Professional Training:

University of North Carolina – Esophageal Motility Fellow, 2010
Duke University – Gastroenterology Fellowship, 2008-2011
Duke University – Internal Medicine Residency, 2005-2008


Case Western Reserve University School of Medicine – MD, 2005

Board Certification:

American Board of Internal Medicine, Gastroenterology, 2011
American Board of Internal Medicine, 2008