About
Thomas McNamara, MD earned his undergraduate degree in Biology from The Catholic University of America, where he was inducted into the Sigma Xi Honor Society. He went on to earn his medical degree from Georgetown University School of Medicine in 1981 and completed both his internship and internal medicine residency at the University of Cincinnati. The American Board of Internal Medicine and the National Board of Medical Examiners both certify him.
With nearly 25 years of practice in the Bethesda community, Dr. McNamara has developed a strong focus on cardiovascular disease, hypertension, diabetes, and preventive medicine. Washingtonian Magazine has named him a Top Doctor annually since 1998, and Checkbook Magazine has recognized him since 2010. He partners with each patient to build a personalized healthcare plan that addresses current conditions while working to prevent new ones from developing.
Education & Training
Undergraduate
The Catholic University of America, Washington, DC — B.A., Biology, 1975
Medical School
Georgetown University School of Medicine, Washington, DC — Doctorate of Medicine, 1981
Residency
University of Cincinnati, Cincinnati, OH — Internal Medicine Residency (1982–1984)
Additional Training
Internship: University of Cincinnati, Cincinnati, OH (1981–1982)
Certifications
Conditions Treated
Who is Dr. McNamara right for?
Dr. McNamara is a strong fit for adults managing cardiovascular disease, hypertension, or diabetes. Patients who prioritize prevention and want a personalized, long-term health plan benefit from his approach. He works well with those seeking a physician with deep roots in the Bethesda community. His focus on both treating current conditions and preventing new ones suits patients with complex or chronic health profiles.
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Frequently Asked Questions
Dr. McNamara focuses on cardiovascular disease, hypertension, diabetes, and preventive medicine. He brings nearly 25 years of internal medicine experience in the Bethesda community to each of these areas. His approach combines managing active conditions with building strategies to prevent new ones from developing.
Yes. The American Board of Internal Medicine and the National Board of Medical Examiners both certify Dr. McNamara. He earned his medical degree from Georgetown University School of Medicine in 1981 and completed his residency in internal medicine at the University of Cincinnati.
Dr. McNamara earned his medical degree from Georgetown University School of Medicine in 1981. He completed both his internship and his internal medicine residency at the University of Cincinnati. He also holds a Biology degree from The Catholic University of America, where he earned membership in the Sigma Xi Honor Society.
Yes. Washingtonian Magazine has named Dr. McNamara a Top Doctor every year since 1998. Checkbook Magazine has also recognized him since 2010. These honors reflect his long record of clinical excellence in the Washington, DC metro area.
Dr. McNamara partners with each patient to build a personalized healthcare plan. That plan addresses current health conditions while also working to prevent new ones from developing. His focus on both treatment and prevention suits patients who want a proactive, relationship-driven approach to their health.
Dr. McNamara sees adult patients, with a particular focus on those managing cardiovascular conditions, hypertension, and diabetes. He also works with patients who want a strong preventive medicine strategy. His nearly 25 years of experience in Bethesda make him well-suited for patients seeking a physician with deep community ties.
Doctor profile last updated March 21, 2026