Gina Mercado, AGACNP-BC

Leah Huff, FNP-C, began her career in medicine as a registered nurse after earning her Bachelor of Science at the University of Texas at Tyler in 2012. She returned there to earn her Master of Science in Nursing in 2016 to become a board-certified nurse practitioner. Inspired to practice medicine by her mother's breast cancer journey and recovery, Leah sees patients of all ages for well care and the treatment and management of chronic conditions such as hypertension, Type 2 diabetes, chronic kidney disease, COPD, anxiety/depression, and acute complaints such as infections, abdominal pain, and joint or back pain. She joined Kelsey-Seybold in October 2023.

Christy Knowles, APRN, PNP-PC, is a certified pediatric nurse practitioner at Kelsey-Seybold. She earned her Bachelor of Science in Nursing at the University of Mississippi School of Nursing in Jackson. She then relocated to Texas, attending the University of Texas Health Science Center at Houston Cizik School of Nursing to earn her Master of Science in Nursing - Pediatric Nurse Practitioner. Christy joined Kelsey-Seybold in March 2025. She offers primary well care and annual checkups in addition to sick care for acute illness and injury. Christy also helps manage chronic conditions such as asthma, acne, allergies, and more. Her clinical interests center on wellness care, obesity management and prevention, and care for student athletes.

Alexandrya Tran, MSN, AGACNP-NC, is a Nurse Practitioner at Kelsey-Seybold Clinic. In 2017, Alexandrya completed a Bachelor of Science in Nursing with honors from Texas Woman's University. She then returned to the University of Texas Medical Branch where she obtained a Master of Science in Nursing to become an Acute Care Adult Gerontology Nurse Practitioner in 2021. Alexandrya treats adult patients with both chronic and acute conditions. Before joining Kelsey-Seybold Clinic in 2023, Alexandrya worked as a clinical nurse, an ICU nurse, and a nurse practitioner.