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Meet our Physicians

Orlando Office
2415 N. Orange Avenue, Suite 501
Orlando, FL 32804

Richard Pratley, MD

Dr. Richard PratleyDr. Richard Pratley, MD serves as the Medical Director of the Florida Hospital Diabetes Institute (FHDI). Dr. Pratley is also a Senior Scientist at the Florida Hospital /Sanford-Burnham Translational Research Institute for Metabolism and Diabetes (TRI) and a Professor at the Sanford-Burnham Medical Research Institute at Lake Nona. He is board-certified in internal medicine, received his medical degree from Wayne State University in Detroit and completed fellowships in geriatric medicine and gerontology at the University of Michigan, John Hopkins University and the National Institute on Aging. Dr. Pratley is an internationally recognized expert in diabetes. He frequently lectures on diabetes to international audiences, has conducted numerous important studies on the pathogenesis, prevention and treatment of diabetes and has published over 150 peer reviewed articles on diabetes. He is currently a member of the editorial board of The Lancet Diabetes and Endocrinology.

Damon Tanton, MD

damon tantonDr. Damon Tanton is the Medical Director of Clinical Practice at the Florida Hospital Diabetes Institute. He is Board Certified in Endocrinology, Diabetes, Metabolism and Internal Medicine.  He received his medical degree from the University of Miami School of Medicine, Miami, FL, and completed his residency in Internal Medicine at Wright-Patterson Medical Center, Fairborn, OH.  He completed his Endocrinology Fellowship at Wilford Hall Medical Center, Lackland AFB, TX.  He and his staff offer comprehensive services for pre-diabetes, obesity medicine, metabolism, diabetes, hypogonadism (low testosterone), osteopenia, osteoporosis, adrenal and pituitary disease, and vitamin D/calcium/parathyroid disorders.  Dr. Tanton specializes in ultrasound-guided fine needle aspiration (biopsy) of the thyroid and ethanol sclerotherapy of thyroid nodules.

Carmina Charles, MD

Dr. CharlesDr.  Charles is board certified in internal medicine and endocrinology. She expands the nutrition and female-focused services and specialties available, such as diagnosis and treatment of polycystic ovary syndrome (PCOS), continuous glucose monitoring system (CGMS) and Hirsutism by utilizing ultrasound and thyroid biopsies, combined with the most advanced medical techniques and instrumentation. Dr. Charles earned the coveted Chief Endocrinology Fellow status, and will apply her advanced certifications and offer leading-edge diagnostics, treatments and therapies to women and men, ensuring patients have access to the latest and most comprehensive care available.

Throughout her diabetes, endocrinology and metabolism medical training, which began with medical school at Ross University, Dr. Charles has held various committee and board positions, participated in numerous conferences, co-published several articles and contributed her medicine expertise toward teaching numerous medical school and undergraduate courses. Her impressive honors and professional affiliations further prove her dedication to the field of diabetes, endocrinology and metabolism.

Andrew S. Martin, MD

Dr. Andrew MartinDr. Andrew Martin received his Medical Degree from the University of the West Indies, and completed his Internal Medicine Residency at Howard University. He completed his Endocrinology Fellowship at George Washington University in Washington, D.C. Dr. Martin is board certified in Internal Medicine, Diabetes, Endocrinology and Metabolism. He is a fellow of the American College of Clinical Endocrinologists, a member of the American Diabetes Association and the Endocrine Society, and a Certified Diabetes Educator. Special interests outside of diabetes and thyroid care include weight and lipid management. Dr. Martin has been practicing clinical endocrinology for the past 14 years and has been at the Florida Hospital Diabetes Institute for 9 yrs. He is currently the Clinical Coordinator of the center.

Ramon A. Urdaneta, MD

Dr. Ramon UrdanetaDr. Ramon Urdaneta was born in San Juan, Puerto Rico, and is fluent in both English and Spanish. He received his medical training at the Tulane University School of Medicine and his Internal Medicine Residency at the Naval Hospital in Oakland, California. Dr. Urdaneta completed his post-graduate training and endocrinology fellowship at the National Naval Medical Center in Bethesda, Maryland, and is board certified in Internal Medicine, Diabetes, Endocrinology and Metabolism. He is also a fellow of the American College of Clinical Endocrinologists and the Endocrine Society. Special interests include thyroid cancer and other thyroid disorders, diabetes care and management.

Michael J. Cronyn, PA

Michael J. Cronyn

Michael J. Cronyn, MPAS, PA-C, CDE is board-certified and licensed as a physician assistant, registered nurse and certified diabetes educator. He has over two decades of experience in family medicine, internal medicine and endocrinology practice settings. Michael now specializes in diabetes management and medical education. He is an experienced coordinator of diabetes education training and medically related educational programs for medical providers, students and patients. He is involved in transitional diabetes care from pediatric to adult endocrinology practices and diabetic athletes. Michael continuously gains experience and leadership through professional memberships and serving on numerous volunteer medical and service oriented committees.


Kissimmee Office
2400 N. Orange Blossom Trail, Suite 306
Kissimmee, Florida 34744

Juan Carlos Varon, MD

Dr. Juan Carlos Varon

Dr. Juan Carlos Varon is a bilingual endocrinologist, fluent in English and Spanish, and provides advanced medical evaluation and treatment of diabetes, metabolism, and endocrine disorders at Florida Hospital Kissimmee. He completed his post-graduate training and endocrinology fellowship at the University of Miami-Miller School of Medicine and is board certified in Internal Medicine, Diabetes, Endocrinology and Metabolism. Dr. Varon is a member of the American Medical Association, American Association of Clinical Endocrinologists and the Endocrine Society.


Maria Roque, ARNP

Maria Roque, MSN, FNP-BC is a certified nurse practitioner with over ten years of experience providing skilled and compassionate care to patients and their families. She works in tandem with the physicians of Florida Diabetes & Endocrine Center to extend holistic health care in a family-oriented practice using evidence-based medicine. Previously, Maria served in nurse practitioner roles at institutions such as Heart of Florida Medical Center, Florida Hospital Orlando and Florida Hospital College of Health Sciences.





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