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Skip Navigation LinksHarris Health About Us Board of Trustees Ewan D. Johnson, MD, PhD

Ewan D. Johnson, MD, PhD

Dr. Ewan D. Johnson is a physician specializing in internal medicine and medical oncology. He is a member of Tomball Regional Internal Medicine Associates, and serves as Chairman of the Board of HCA Houston Healthcare- Tomball. Dr. Johnson’s dynamic professional experience is demonstrated in his role as a senior aviation medical examiner authorized by the Federal Aviation Administration to evaluate pilots and air traffic controllers in the nation and has privileges and affiliations with multiple medical centers and hospitals in Texas.

With a career straddling both industry and academia, Dr. Johnson received his PhD in Organic Chemistry and currently serves as a member of Rice's Institutional Review Board. Dr. Johnson broadened his expertise in treating patients with cancer by pursuing a postgraduate fellowship in medical oncology at The University of Texas MD Anderson Cancer Center, and has many peer reviewed articles and abstracts on the subject to his credit. He has served academic administrative appointments including his term as director of the Graduate Medical Education Core Curriculum Lecture Series for MD Anderson. Dr. Johnson is also a member of the prestigious Mensa International High IQ Society and stays involved with numerous professional organizations, including the American College of Physicians, the American Medical Association, the American Society of Clinical Oncology, the Texas Society of Medical Oncology, the American College of Physician Executives, and the Aerospace Medical Association. Dr. Johnson is a 5-star physician as reported by Healthgrades®.

Original Appointment: December 2016