Our Location

      19026 Ridgewood Parkway,
      Suite 119
      San Antonio, TX 78259

      About Us


      Root Causes Medicine is a functional and regenerative medicine practice devoted to discovering and reversing the underlying causes of chronic and complex illness. Put simply, we search for the answers to the question, “Why?”

      "Why am I so tired?”
      “Why do I have intractable pain?”
      “Why do I have to have surgery, again?”
      “Why is this medication not helping me and possibly hurting me?”

      …and many others.

      The good news is that there is always an answer, and there is always something that can be done.

      Our providers will explore all of the regenerative medicine therapies available in an attempt to relieve the symptoms, slow the progression, or reverse the disease process.

      To see if we can help you get your health back, please give us a little information about yourself by filling out the form below.

      Meet the Practitioner

      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.

      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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