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Frederick W. Lewis, M.D., FACG, FACP
in Denver

About Frederick W. Lewis, M.D., FACG, FACP

Dr. Lewis, a Colorado native, graduated from Cherry Creek High School in 1975. He has had the privilege of practicing Gastroenterology in south Denver since 1991. He is past-President of South Denver Gastroenterology and served on the SDG Executive Committee for two decades as the practice grew from a small group of dedicated doctors into one of the larger specialty gastroenterology practices in the region. Dr. Lewis has served as the primary GI consultant at Craig Rehabilitation Hospital since the 1990s.

When not working, Dr. Lewis enjoys biking, open-water swimming, skiing and snowshoeing with his wife of 34 years. He serves on the Board of the international non-profit organization “Lacrosse the Nations” which provides leadership and educational opportunities to children in impoverished communities in Nicaragua, Panama and Columbia.


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Patient Care Philosophy

I believe listening carefully to each patient’s story sets the stage for excellent gastroenterology care. I favor shared decision making, taking into account each patient’s goals and preferences along with a thorough understanding of the current science of gastroenterology. In addition, I focus on providing personal and compassionate care.

Clinical Expertise

Diseases of the bile duct and pancreas
Diagnostic and therapeutic ERCP
Barrett’s esophagus and prevention of esophageal cancer
Gastroesophageal reflux disease (GERD) 
Gastrointestinal problems in brain and spinal cord injury patients


The Colorado College, BA, High Honors
Boettcher Scholar, National Merit Scholar
Emory University School of Medicine, MD, with Honors
Emory University, Internship and Residency, Internal Medicine
University of Colorado Health Sciences Center, Fellowship, Gastroenterology

Board Certifications and Societies

American Board of Internal Medicine
American Board of Internal Medicine/Gastroenterology

Associations and Memberships

Fellow, American College of Gastroenterology (FACG); Regional ACG Governor for the State of Colorado 2017-2020
Fellow, American Gastroenterological Association (AGAF)
Member, American Society for Gastrointestinal Endoscopy (ASGE)
Swedish Medical Center Peer Review Committee
Craig Rehabilitation Hospital Medical Executive Committee

Dr. Lewis is always so kind and very knowledgeable, I always leave my visit feeling better. Thank you, Dr. Lewis.

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Dr Lewis is the best physician I've ever had.

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South Denver GI Locations

Englewood Clinic

499 East Hampden, Suite 420 Englewood, CO 80113

Get Directions Parking Map
P: 303.788.8888
F: 866.896.1158

South Denver Endoscopy Center

499 E. Hampden, Suite 430 Englewood, CO 80113

Get Directions Parking Map
P: 303.788.8888
F: 866.896.1158