Our Physicians

Michiana Gastroenterology physicians use the Center for their patients. Each physician has received advanced training in gastroenterology and endoscopy. Click here to visit the Michiana Gastroenterology website.


Patrick J. O’Dea, M.D., FACG, FACP, AGAF
Undergraduate-B.S. ·
University of Notre Dame · 1967

Medical School-M.D. ·
Indiana University · 1971

Fellowship trained in Gastroenterology ·
Indiana University · 1978

Board Certification-American Board
of Gastroenterology · 1979

Fellowship-American College of
Physicians

Fellowship-American College of
Gastroenterology

Fellowship-American Gastroenterology
Association


John G. Mathis, M.D.
Undergraduate-B.A. ·
University of Evansville · 1973

Medical School-M.D. ·
Indiana University · 1976

Fellowship trained in Gastroenterology ·
Indiana University · 1981

Board Certification-American Board
of Gastroenterology · 1981


David G. Mark, M.D.
Undergraduate-B.A. ·
Goshen College · 1982

Medical School-M.D. ·
Indiana University · 1986

Fellowship trained in Gastroenterology ·
Indiana University · 1993

Board Certification-American Board
of Gastroenterology · 1993


Oliver D. Gilliam, M.D., FACG
Undergraduate-B.S. ·
Louisiana State University · 1978

Medical School-M.D. ·
Louisiana State University · 1982

Fellowship trained in Gastroenterology ·
Wayne State University · 1987

Board Certification-American Board
of Gastroenterology · 1989

Fellowship-American College of
Gastroenterology


Michael A. Manbeck, M.D
Undergraduate-B.A. ·
Earlham College · 1986

Medical School-M.D. ·
The Ohio State University · 1990

Fellowship trained in Gastroenterology ·
Loma Linda University · 1996

Board Certification-American Board
of Gastroenterology · 1995


Pankaj A. Patel, M.D.

Undergraduate/Medical School-M.D. ·
University of Nigeria · 1993

Fellowship trained in Gastroenterology and Hepatology ·
State University of New York (SUNY), Buffalo · 2002

Masters of Science Epidemiology (MS) ·
SUNY Buffalo · 2001-2002

Board Certification-American Board
of Gastroenterology · 2003
 



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