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Kalispell Regional Healthcare

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HomeMedical Staff DirectoryThomas E. Flass, MD, MS

Thomas E. Flass, MD, MS

Thomas E. Flass, MD, MS

Pediatric Gastroenterology


Pediatric gastroenterologist Thomas Flass, MD, MS, has broad experience in helping build a strong pediatrics program in central and western Montana. He completed his medical degree at the University of Colorado and carried out both his residency and fellowship at the Children’s Hospital of Colorado. Before coming to Kalispell, he practiced at the Fortin Pediatric Specialty Clinic with St. Vincent Healthcare in Billings. He also served for five years as director of education and marketing for Vitamin Logic, Inc., and taught and did research in nutrition at Colorado State University. Dr. Flass’s professional interests are nutrition’s effects on health, celiac disease, gluten intolerance and treating children from infants up to 19 years old. He enjoys spending time with his family in the outdoors, fishing, hiking and skiing.


The American Board of Pediatrics – Pediatrics
The American Board of Pediatrics – Pediatric Gastroenterology


Children's Hospital Colorado – Pediatric Gastroenterology, Hepatology and Nutrition


Children's Hospital Colorado

Medical School

University of Colorado School of Medicine


Kalispell Gastroenterology
75 Claremont Street, Suite F
Kalispell, MT 59901
p: (406) 752-7441

Hospital Privileges

Kalispell Regional Medical Center
The HealthCenter

Financial Assistance

This provider subscribes to the Kalispell Regional Healthcare Financial Assistance Program.