Meet Our Team: Pulmonologists | University Transplant Center in San Antonio, TX

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About Us


Pulmonology is the study of the function and diseases of the respiratory system, including the lungs. Our pulmonologists are specially trained to take care of transplant patients.

Dr. Debbie LevineDeborah Jo Levine, MD, FCCP
Medical Director of Lung Transplantation
Director of Pulmonary Hypertension Center
Professor of Medicine
Pulmonary Diseases & Critical Care Medicine
UT Health San Antonio

Dr. Levine is the medical director of the lung transplant program and the director of the Pulmonary Hypertension Center at University Health System and UT Health San Antonio. She received her medical degree at the University of Arizona before pursuing medical residency and pulmonary fellowship in Arizona. She then completed her critical care fellowship and a specialized fellowship in Lung Transplantation and Interventional Pulmonary at UT Health San Antonio.  Since that time, she has devoted all of her clinical time to evaluating and managing pre-and post-lung transplant patients as well as patients with pulmonary hypertension.   Her primary research focuses on antibody mediated rejection in lung transplantation, but she is also working with lung donors and how to better manage them in the ICU. Dr. Levine is the principle investigator on many multi-center trials in both lung transplant and pulmonary hypertension and has presented and published in both specialties.


Dr. PhilipOngPhilip Ong, MD
Assistant Professor
Pulmonary Diseases & Critical Care Medicine
UT Health San Antonio

Dr. Philip Ong has special training in both Transplant and Interventional Pulmonology. He is board-certified by the American Board of Internal Medicine (ABIM) in Internal Medicine, Pulmonary Disease and Critical Care Medicine. He received his Doctor of Medicine (MD) at St. Luke’s College of Medicine in Quezon City, Philippines. He then moved to the US and completed Internal Medicine training at Bridgeport Hospital - Yale New Haven Health in Bridgeport, CT. After this, he completed his Pulmonary, Critical Care and Lung Transplantation training at Baylor College of Medicine in Houston, TX in 2014.  

After his training, he stayed on as faculty at Baylor College of Medicine in Houston, and was part of the medical staff with his practice primarily based at Baylor St. Luke’s Medical Center, Baylor Clinic and Texas Heart Institute.  Due to his interest in emerging invasive pulmonary procedures, he pursued additional training in Interventional Pulmonology at the University of Texas MD Anderson Cancer Center in Houston.

He has published and presented scientific papers with special interest in lung transplantation, and novel minimally invasive techniques to manage malignant and benign central airway obstruction, and emerging technologies in the diagnosis of lung cancer.


Dr. Stephanie LevineStephanie Levine, MD, FCCP
Program Director of Pulmonary & Critical Care Fellowship
Professor of Medicine
UT Health San Antonio

Dr. Levine is board-certified in internal medicine, pulmonary disease, and critical care medicine. She received her undergraduate degree from the University of Pennsylvania and her medical degree from the George Washington University School of Medicine, where she was a member of the Alpha Omega Alpha Medical Honor Society. She completed her Internship and Residency in Internal Medicine and Fellowship in Pulmonary Disease and Critical Care Medicine at the New York University-Manhattan Veterans Administration-Bellevue Hospital Program in New York City.

Dr. Levine is the Program Director of the Pulmonary and Critical Care Fellowship at the University of Texas Health Science Center and is currently the Co-Director of the Medical Intensive Care Unit and Bronchoscopy Laboratory at University Hospital. Dr. Levine has authored or co-authored over 270 manuscripts, chapters, reviews, editorials, and abstracts, primarily in her major field of interest, lung transplantation. Her other areas of interest include pulmonary and critical care issues in pregnancy and women’s lung health, and eosinophilic lung disorders.

Dr. Levine is an active member of CHEST (the American College of Chest Physicians) with many former leadership positions in the organization.  She is currently on the Board of Regents of CHEST and has been selected to serve as CHEST President for the 2019-2020 term.

Dr. Holly KeytSergio Burguete, MD

Dr. Burguete is a board certified Pulmonary and Critical Care physician, additionally trained in Lung Transplant and Interventional Pulmonology. He is certified by the American Board of Internal Medicine in Pulmonary, Critical Care and general Internal Medicine and completed his training at the University of Texas Health Science Center in San Antonio. Dr. Burguete treats adult patients with diseases of the lungs and airways; he has further training in the management of patients who have received lung transplants and for patients who have complex airway disorders. He has special interests in relief of malignant airway obstruction and in noninvasive techniques for staging lung cancer with endobronchial ultrasound.

He received his undergraduate degree from Boston University and his medical degree from the University of Texas Medical School at Houston where he graduated with honors. All of his post-graduate medical training was obtained in San Antonio where he developed a passion for treating patients with disorders of the respiratory system. Dr. Burguete has published scientific articles and continues to participate in research. He enjoys teaching the pulmonary fellows and has a passion for continued learning and improvement so as to provide the best possible care for his patients.


Dr. Holly KeytHolly Keyt, MD
Medical Director of Adult Cystic Fibrosis Center
Assistant Professor
Pulmonary Diseases & Critical Care Medicine
UT Health San Antonio

Dr. Keyt is originally from Idaho and attended Pepperdine University where she completed a B.A. in Political Science, cum laude. She then went on to medical school and received an M.D. from the University of Nebraska Medical Center in Omaha, NE. After completing an internship at Providence St. Vincent Medical Center in Portland, OR, she moved to San Antonio and completed her residency in Internal Medicine at UT Health San Antonio. She then completed fellowships in Pulmonary and Critical Care Medicine and is now triple-board certified in Internal Medicine, Pulmonary Medicine and Critical Care Medicine.

Dr. Keyt joined the faculty at UT Health San Antonio in 2015 as the founding director of the Adult Cystic Fibrosis Center which has been accredited by the Cystic Fibrosis Foundation. She joined the lung transplant team in 2016 and continues to focus her inpatient and outpatient clinical work in the areas of cystic fibrosis (CF) and lung transplantation. Her areas of interest in research include pulmonary infections in CF and the CF microbiome. In her free time, she enjoys spending time with her family, running and playing the piano.