Dr. Lopez did her residency in Pediatrics at the University of Illinois at Chicago, IL,  and her fellowship in Pediatric Endocrinology at Massachusetts General Hospital/Harvard Medical School,  Boston, MA.

She has performed research in the area of type 2 diabetes and obesity in adults and pediatrics  and has participated in several multicenter clinical trials with new drugs for type 2 diabetes.

She is currently the Medical Director for the GENder, Education and Care Interdisciplinary Support (GENECIS) program, which provides mental health and endocrine care for gender non-conforming children and adolescents.


Medical School
Universidad La Salle/Facuitad de Medicina (2000)
University of Illinois at Chicago (2005), Pediatrics
Massachusetts General Hospital (2008), Pediatric Endocrinology

Specialty Areas

Clinical Interest

  • Diabetes Mellitus Type 1
  • Diabetes Mellitus Type 2
  • Research Interest

    • Gender dysphoria in children and adolescents.
    • Metabolic effects of endocrine therapy in adolescents with gender dysphoria.
    • Obesity in childhood.
    • Type 2 diabetes in pediatrics.


    Featured Publications LegendFeatured Publications

    Impact of GLP-1 and GLP-1 Receptor Agonists on Cardiovascular Risk Factors in Type 2 diabetes
    Verge D, Lopez X Curr Diabetes Rev April 2010
    Insulin Enhances Glucose-Stimulated Insulin Secretion in Healthy Humans
    Bouche C*, Lopez X*, Fleischman A, Cypess AM, O?Shea S, Stefanoviski D, Bergman RN, Rogatsky E, Stein DT, Kulkarni RN, Kahn CR, Goldfine AB Proc Natl Acad Sci U S A March 2010 107(10) 4770-5
    Family History of Diabetes Impacts on Interactions between Minimal Model Estimates of Insulin Sensitivity and Glucose Effectiveness
    Lopez X, Bouche C, Tatro E, Goldfine AB Diabetes Obes Metab February 2009 11(2) 123-30
    Human Insulin Analog Induced Lipoatrophy
    Lopez, X, Castells M, Velazquez EF, Ricker A, Lin D, Mun E, Goldfine AB Diabetes Care March 2008 31(3) 442-4
    Hypoglycemia in Children (chapter)
    American Academy of Pediatrics Nutrition Handbook 6th ed Lopez X, Levitsky LL 2007

    Honors & Awards

    • Graduation with honors from medical school

    Professional Associations/Affiliations

    • World Professional Association for Transgender Health (WPATH) (2014)
    • Pediatric Endocrine Society (2006)
    • American Academy of Pediatrics (2002)