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Grant M. Barnum, D.O., FACOI


Grant Barnum, D.O., FACOI, provides primary care to adults at Lake Regional Clinic – Lake Ozark. His practice is focused on, but not exclusive to, adults 65 years old and older. His services include health maintenance for adults; care for chronic conditions, such as diabetes, hypertension, chronic lung disease and heart problems; and other general medical conditions.

“I was drawn to internal medicine out of a desire to help adults live healthy lives for as many years as they are given,” Dr. Barnum said. “I strive to give patients information they can use to improve their health and avoid complications of disease. I find it rewarding when patients take an active role in their own health maintenance, and I encourage them to do so through active discussions about their concerns and health issues.”

Dr. Barnum has more than 30 years of experience in internal medicine. He began practicing at the lake in 1996 and joined Lake Regional in 2006. He has served on the board of directors for Lake Regional Health System since April 2012.

Learn more about services at Lake Regional Clinic - Lake Ozark.

Professional Experience

Lake Regional Hospital, Chief of Staff, Osage Beach, Mo., Oct 2004 - Sep 2006
Internal Medicine Associates of the Ozarks, Physician, Osage Beach, Mo., Jan 1996 - Jan 2006
Internal Medicine Clinics, Physician, Kirksville, Mo., Aug 1991 - Dec 1995
United States Air Force, Major/Staff Internist and Chief, Internal Medicine, Kirtland Air Force Base, Albuquerque, New Mexico, Jul 1987 - Jul 1991

Facilities Lake Regional Clinic - Lake Ozark
Medical School Kirksville College of Osteopathic Medicine, Kirksville, Mo., June 1983
Internship Internal Medicine, Tulsa Regional Medical Center, Tulsa, Okla., Jul 1983 - Jun 1984
Residency Internal Medicine, Des Moines General Hospital, Des Moines, Iowa, Jul 1984 - Jun 1987


National Board of Examiners for Osteopathic Physicians and Surgeons (Diplomate)


American Osteopathic Association
American College of Osteopathic Internists (Fellow)

Board certification

Aviation Medical Examiner (class 1, 2 and 3 physicals), Federal Aviation Administration
Internal Medicine, American Osteopathic Board of Internal Medicine
Geriatric Medicine, American Osteopathic Board of Internal Medicine

Guide to Patient Experience Surveys and Ratings

Lake Regional Health System values the relationships we have with our patients and their loved ones. As part of our commitment to you, we now post our physicians’ patient experience ratings online.

This guide explains how we capture and report patient experience ratings. We hope this information helps you as you consider appointments with our physicians and providers.

Patient rating breakdown

Patient comments