Our Location

      19026 Ridgewood Parkway,
      Suite 119
      San Antonio, TX 78259

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      Complex illness demands a new and different medical model.

      Root Causes Medicine is a functional medicine practice devoted to evaluating patients as a whole person and searching for the unique causes that are contributing to illness. Our providers dig deep into the underlying and often hidden causes of illness and use natural methods whenever possible to relieve symptoms and reverse the progression of disease. The Functional Medicine method provides a new way for medical providers to consider complex problems and provides a new way for patients to manage their illness.

      Root Causes Medicine doesn’t treat medical conditions. We treat People.

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      Derek Guillory, MD

      Derek Guillory, MD

      Derek W. Guillory, MD, our founder and Medical Director, earned his Bachelor of Science in Education at Baylor University in 1997, graduating Magna Cum Laude. In 2001, he graduated from the University of Texas Southwestern Medical Center in Dallas. He continued his medical training in Emergency Medicine at UT Southwestern Medical Center, graduating in 2004. He has been continuously Board Certified by the American Board of Emergency Medicine since 2005.

      He became one of the first Certified Functional Medicine Practitioners in Texas in 2015.

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      Root Causes Medicine: Stem Cell Clinic


      19026 Ridgewood Parkway, Suite 119
      San Antonio, TX 78259


      Mon: 10:00 AM - 6:00 PM
      Tue: 10:00 AM - 6:00 PM
      Wed: 10:00 AM - 6:00 PM
      Thu: 10:00 AM - 6:00 PM
      Fri: 10:00 AM - 6:00 PM
      Sat: Closed
      Sun: Closed
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