Our San Antonio - Stone Oak location has closed. Dr. Petr will now see all patients at U.S. Dermatology Partners San Antonio.

Young McMahan, MD, FAAD


Board-Certified Dermatologist
Fellow of the American Academy of Dermatology

Dr. Young Thi McMahan joined the Waco practice of U.S. Dermatology Partners following her dermatology residency at University of Texas Medical Branch in Galveston where she served as chief resident.

Dr. McMahan, a Texas native, earned her undergraduate degree in biochemistry from Pepperdine University in Malibu, California. She returned to her home state to attend medical school at Texas Tech University Health Sciences Center in Lubbock, where she received a research fellowship grant from the American Pediatric Society. Dr. McMahan completed her internship in San Antonio at University of Texas Health Science Center.

Dr. McMahan has authored and co-authored nearly two dozen publications throughout her studies and took on several community leadership and mentorship roles including a two-year term as a board member for the Texas Dermatological Society. She volunteers as often as she can, eager to pay forward the kindness she received growing up.

She is fascinated by the depth and complexity of dermatology. “I love how people’s skin tells the story of their lives,” says Dr. McMahan. “You just have to take the time to look at it.”

Dr. McMahan is passionate about providing physical healing for her patients and relishes the emotional healing that often follows. She is particularly interested in skin cancer, skin cancer surgery and skin aging.

Dr. McMahan enjoys traveling, practicing yoga, cooking (and eating) and spending time with her family and dog. She’s a huge Disney fan (ask her about her first trip to Disney World!). She and her husband, Dr. Cody McMahan, have a young son and are thrilled to settle in Waco, near Cody’s family and his beloved Baylor Bears. She’s eager to become a part of the community.

Clinic Locations

U.S. Dermatology Partners Waco
U.S. Dermatology Partners Waco

300 Richland West Circle
Suite 2C
Waco, TX 76712

(254) 340-6000

What Our Patients Say

Young McMahan, MD
5 Stars  First time visit She is easy to talk to and very helful, i would recommend her. –
Source : Vitals – Nov 13, 2018
Young McMahan, MD
5 Stars  Very careing and personable. Wonderful experience. –
Source : Healthgrades – Oct 27, 2018
Young McMahan, MD
5 Stars  Great visit. Dr McMahan was very thorough as well as friendly,easy to talk to and attentive! I would recommend her highly! –
Source : Healthgrades – Oct 01, 2018

Services Offered By Dr. McMahan