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Dr. Derek Guillory
MD, Emergency medicine trained and boarded, IFM Certified Practitioner
My passion for helping people heal by understanding “causes”has grown through constant and continual medical training while actively practicing for 20 years in outpatient clinics and emergency departments, treating everything from acute minor conditions to chronic, complex illness and the critically-ill.

Dr. Guillory has a passion for functional medicine that was born out of his own personal struggle with health concerns that began as a child. That passion has persisted and grown through years of medical training and through almost two decades of medical practice treating all types of illness, from acute and critical
illness to complex, chronic disease. He has an insatiable curiosity for the question most often asked by his patients… “Why am I sick?”

Dr. Guillory became one of the first certified functional medicine practitioners in Texas in 2015. He 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.

ADDITIONAL PHYSICIAN REFERRALS

Although Dr. Nasha no longer provides direct patient consultations, the following trusted individuals have worked closely with Dr. Nasha for many years offering a variety of supportive and life-changing services. They are trusted physicians that have graduated our program and we recommend without hesitation.

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Edit Ann Zelkind, PA
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Kelly Busby, DO, BCNMM/OMM, BCACOFP, IFMCP
Cortez, CO
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Dr. Lori Bouchard, BHSc, ND
Oakville, ON L6M 4J2, Canada
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Laura Mouriño, ND
Cleveland, OH
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Dr. Kimberly Williford, MS, RD, LD, NMD
ATLANTA, GA
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Miriam Rahav, M.D.
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Sara Korsunsky, BSC, N.D.
Manitoba, Canada
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Marvin Hershberger, ND
Millersburg, Ohio
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Dr. Doreen DeStefano, DNP, NHD, APRN
FORT MYERS, FL
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Dr. Jenny Levin, MD, BSc (Med)
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Micah Jackson, PA-C
Texas, Consulting Only
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Dr. Deborah Kennedy, ND PhD
Ontario, Canada
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Dr. Dagmara Beine
Pediatric Oncology Specialist, Thiensville WI
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Dr. Sveta Silverman, MD, FRCP
Edmonton, Alberta, Canada
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B. STEPHENS DUDLEY, M.D.
Nashville, TN
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Jessica Tran, ND
Irvine, CA
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Dr. Michelle Rojas
Family Practice Physician, Columbia, SC
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Jane Langridge, ND, FCMA, MIFA, AHPR, CERT ED
U.K.
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Dr. Erin Holston Singh
NATUROPATHIC PHYSICIAN, Cleveland Heights, OH
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Dr. Niki Young, ND
Fair Oaks, CA
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Dr. Mark Carney, ND, LAc
Denver, CO
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Dr. Wafaa Abdel-Hadi, MD, IFMCP
Sheikh Zayed, Giza EG
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Dr. Chris Duhon, ND, L.Ac
Seattle, WA
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Dr. Melanie Gisler, D.O., FAAO
Osteopathic Family Physician
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Dr. Derek Guillory
MD, EMERGENCY MEDICINE TRAINED AND BOARDED, IFM CERTIFIED PRACTITIONER, San Antonio, TX