Chelsea A. Castillo, DO, MS, FAAP

Dr. Chelsea Castillo considers herself a native of San Antonio (Go Spurs Go!), though she spent most of her childhood in Houston. By the age of six, she had her sights set on becoming a “kids’ doctor.” This dream was only further solidified when her younger sister was diagnosed with Ewing’s Sarcoma, a bone cancer, in 2007. Through the compassion, fierce advocacy, wisdom and team mentality she saw in the medical team taking care of her sister, she gained life-long lessons to help care for future patients as a pediatrician. The lessons learned by walking alongside her sister in her battle with cancer impacts the way she cares for her patients and families daily. Throughout high school, Dr. Castillo served as a camp counselor for children with cancer and she continues to fundraise and donate toys to local children’s hospitals every Christmas to honor her sister’s legacy of love.

As a first -generation college student and physician, Dr. Castillo never shied away from a challenge and remained dedicated to following her dreams. She attended Trinity University as an undergraduate, with a major in Sociology with a focus on social determinants of health and minor in Biology. She received her Master of Science in Medical Sciences and medical degree at the UNT Health Science Center in Fort Worth, TX where she met her best-friend, and now fiancé, Dr. Jeffrey Hayes.

After medical school, she returned “home” to San Antonio where she will complete her residency through Baylor College of Medicine in June 2022.  She is currently undergoing additional training to become an International Board-Certified Lactation Consultant. She is excited to join Heritage Pediatrics in August 2022. Her professional passions include breastfeeding support, maternal mental health, preventative medicine, weight management and mission based medical care. Her faith, family, and friends all play an integral role in her life and outside of medicine, she enjoys being outdoors, sand volleyball, exercising, exploring new restaurants and home renovation.