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Physicians

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Mark E. Efrusy, D.O., F.A.C.G., A.C.A.F.
Medical Degree: Chicago College of Osteopathic Medicine, Chicago, Illinois
Residency: George Washington University, Washington D.C.
Gastroenterology Fellowship: George Washington University, Washington D.C.
Board Certification: Internal Medicine and Gastroenterology

Dr. Efrusy sees patients at Munster and Olympia Fields.

John L. Kniaz, D.O.
Medical Degree: Philadelphia College of Osteopathic Medicine
Residency: St. Michael's Medical Center, Newark, New Jersey
Gastroenterology Fellowship: Yale University School of Medicine, New Haven Connecticut
Postdoctoral Fellow: Yale University School of Medicine, Liver Disease Unit, West Haven, Connecticut.

Dr. Kniaz sees patients at Munster and Marcotte (Dyer).

David Herbstman, M.D., F.A.C.G.
Board Certification: Internal Medicine and Gastroenterology.
Gastroenterology Fellowship: University of Chicago, Chicago, Illinois
Residency: Northwestern University Medical Center, Chicago, Illinois
Medical Degree: University of Chicago, Chicago, Illinois.
College: Harvard University, Cambridge, Massachusetts

Dr. Herbstman sees patients at Munster and St. John.

Joel A. Cahan, M.D.
Medical Degree: Chicago Medical School, Chicago, Illinois
Residency: Illinois Masonic Medical Center, Chicago, Illinois
Gastroenterology Fellowship: Northwestern University, Chicago, Illinois
Board Certification: Internal Medicine and Gastroenterology

Dr. Cahan sees patients at Munster and St. John.

Praveen Nallapareddy, M.D.
Medical Degree: Rosalind Franklin University of Medicine
Residency: Loyola University
Gastroenterology Fellowship: Loyola University
Board Certification: Internal Medicine and Gastroenterology

Dr. Nallapareddy sees patients at Munster and Whiting.

Atena Lodhi, MD
Medical Degree: Rush Medical College, Chicago, IL
Residency: Medical College of Wisconsin, Milwaukee, WI
Gastroenterology and Hepatology Fellowship: Medical College of Wisconsin, Milwaukee, WI
Board Certified: Internal Medicine and Gastroenterology

Dr. Lodhi sees patients at Munster and Hammond.

Anoop Appannagari, MD
Medical Degree: Jefferson Medical College, Philadelphia, PA
Residency: University of Chicago Hospital, Chicago, IL
Fellowship: Loyola University, Maywood, IL
Advanced Fellowship: Stony Brook University Hospital, Stony Brook, NY
Board Certified: Internal Medicine and Gastroenterology

Dr. Appannagari sees patients in Munster and Hammond.