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Mary Nguyen, MD, MS

Castroville, Texas
University of Maryland, School of Pharmacy,


Advocacy/Social Justice | Compliance/Regulation | Education Programs
Mary S. Nguyen, M.D., is a board-certified family physician and fellow of the American Academy of Family Physicians. She practices in Castroville, Texas, a rural, underserved
community. She received her undergraduate education at St. Mary’s University in San Antonio, her medical education at the University of Texas Health Science Center at Houston, and completed residency training at CHRISTUS Santa Rosa, San Antonio. She earned her master’s in medical cannabis science and therapeutics from the University of Maryland, Baltimore. She has practiced in Castroville since 2000. As an adjunct clinical professor in the Department of Family Medicine at the University of Incarnate Word School of Osteopathic Medicine, Dr. Nguyen regularly precepts medical students in her office and has done so for more than 20 years. She is the associate medical director for Companion Hospice. She is active with the AAFP, TAFP, AMA, and TMA and has served in officer positions.

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