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Maria Rayas, MD

UT Health San Antonio
Schedule an appointment: 210-358-5437
Pediatric Endocrinology
Board Affiliation/Certification
American Board of Pediatric Endocrinology
American Board of Pediatrics
University of Texas Health Science Center at San Antonio, 2007
University of Texas Health Science Center, 2010
Christus Santa Rosa Residency Program, 2013
University of Texas Health Science Center, 2013

Texas Diabetes Institute

701 S. Zarzamora Street
San Antonio,TX 78207

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I’m a pediatric endocrinologist at University Health and an assistant professor in the division of pediatric endocrinology and diabetes at UT Health San Antonio.
My interests include learning about cystic fibrosis-related diabetes (CFRD) and other CF endocrine related disorders. The majority of my research and presentations have focused on improving the screening, diagnosis and management of CFRD.
For the past seven years, I have helped develop a multidisciplinary clinic for CFRD patients in the CF Center with the CF Center director and staff. I’m the endocrinologist dedicated to seeing the adult CF patients with endocrine disorders. I have a KL2 research grant and a multi-center research grant that collaborates in recruiting and treatment of patients with CF-related diabetes issues.
Research Interests:
  • Continuous glucose monitoring in Type 1 diabetes and cystic fibrosis patients
  • Cystic fibrosis-related diabetes screening, diagnosis and treatment


  1. Lynch JL, Willey-Courand DB, Rayas MS, Guajardo JR..Screening for Cystic Fibrosis-Related Diabetes by an Integrated Care Team Using an Algorithm; 2011 Jan. (Pediatric Pulmonology)..

Book Chapters

  1. Orsi C, Rayas M, Escaname E, Hutchins, J. Chapter 8: Pediatric Type 2 Diabetes Mellitus. In: Orsi CM; Rayas MS; Escaname EN, Hutchins J..Recent Advances in Pediatric Medicine Synopsis of General Pediatric Practice. 2017. p. 105-116..

Journal Articles

  1. Klingensmith GJ, Lanzinger S, Tamborlane WV, Hofer S, Cheng P, deBeaufort C, Gal RL, Reinehr T, Kollman C, Holl R. PDC Consortium: Lynch JL, Orsi CM, Rayas MS, Barajas R..Adolescent Type 2 Diabetes: Comparing the Pediatric Diabetes Consortium and Germany/Austria/Luxemburg Pediatric Diabetes Prospective Registries Pediatr Diabetes 2018 Nov;19(7):1156-1163..
  2. Block JP, Bailey LC, Gillman MW, Lunsford D, Boone-Heinonen J, Cleveland LP, Finkelstein J, Horgan C, Jay M, Reynolds JS, Sturtevant J, Forrest CB,.PCORnet Antibiotics Childhood Growth Study Group Tirado-Ramos A, Rayas M. PCORnet Antibiotics and Childhood Growth Study: Process for Cohort Creation and Cohort Description Acad Pediatr 2018 Jul;18(5):569-576..
  3. Block JP, Bailey LC, Gillman MW, Lunsford D, Daley MF, Eneli I, Finkelstein J, Heerman W, Horgan CE, Hsia DS, Jay M, Rao G, Reynolds JS, Rifas-Shiman SL, Sturtevant JL, Toh S, Trasande L, Young J, Forrest CB, Rayas MS..PCORnet Antibiotics and Childhood Growth Study Group. Early Antibiotic Exposure and Weight Outcomes in Young Children Pediatrics 2019 Jan.
  4. Daley Jean Pierre, Tangpricha Vin, Kelly A, Rayas MS, Hughan Kara..Vitamin D deficiency and its Treatment in Cystic Fibrosis Journal of Cystic Fibrosis 2019 Oct; 18:S66-S73.
  5. Rayas MS, Kelly A, Hughan KS, Daley T, Zangen D..Adrenal Function in Cystic Fibrosis J Cyst Fibros 2019 Oct;18:S74-S81..
  6. Shah R, McKay SV, Levitt Katz LE, El Ghormli L, Anderson BJ, Casey TL, Higgins L, Izquierdo R, Wauters AD, Chang N; TODAY Study Group.(J Lynch, E Escaname, M Rayas) .Adherence to multiple medications in the TODAY (Treatment Options for type 2 Diabetes in Adolescents and Youth) cohort: effect of additional medications on adherence to primary diabetes medication. J Pediatr Endocrinol Metab. 2020 Feb 25;33(2):191-198. doi: 10.1515/jpem-2019-0315. PMID: 31809265..
  7. Kaar JL, Schmiege SJ, Drews K, Higgins J, Walders-Abramson N, Isganaitis E, Willi SM, Marcus MD, Zeitler PS, Kelsey MM. .Evaluation of the longitudinal change in health behavior profiles across treatment groups in the TODAY clinical trial. (J Lynch, E Escaname, M Rayas) Pediatr Diabetes. 2020 Mar;21(2):224-232. doi: 10.1111/pedi.12976 PMID: 31886931..
  8. Arslanian S, El Ghormli L, Haymond MH, Chan CL, Chernausek SD, Gandica RG, Gubitosi-Klug R, Levitsky LL, Siska M, Willi SM; TODAY Study Group. (J Lynch, E Escaname, M Rayas) .Beta cell function and insulin sensitivity in obese youth with maturity onset diabetes of youth mutations vs type 2 diabetes in TODAY: Longitudinal observations and glycemic failure. Pediatr Diabetes. 2020 Jun;21(4):575-585. doi: 10.1111/pedi.12998. Epub 2020 Mar 3. PMID: 32064729..
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