Primary Office

Nicklaus Children's Endocrinology
3100 SW 62 Avenue #102
Miami, FL 33155
Phone Number: 305-662-8368

Additional Office

Nicklaus Children's West Kendall Outpatient Ctr-Endocrinology
13400 SW 120 Street
West Kendall, FL 33186
Phone Number: 305-662-8368


Fellowship - New York-Presbyterian Hospital
Residency - Nicklaus Children's Hospital
Medical School - Universidad Del Valle

Board Certifications

American Board of Pediatrics (Ped Endocrinology) - Certified
American Board of Pediatrics (Pediatrics) - Certified

Chief, Section of Endocrinology
Director, Division of Endocrinology

Dr. Alejandro Diaz is chief of the Nicklaus Children’s Pediatric Specialists (NCPS) Section of Endocrinology and director of the Division of Pediatric Endocrinology at Nicklaus Children’s Hospital. He is also an assistant professor of pediatrics at the Florida International University Herbert Wertheim College of Medicine. Dr. Diaz earned his medical degree from Universidad del Valle in Cali, Colombia. He then completed a residency in pediatrics at Nicklaus Children’s Hospital, followed by a fellowship in pediatric endocrinology at Weill Cornell Medical College/New York-Presbyterian Hospital. His clinical interests include management of children with conditions affecting the normal functioning of the thyroid gland, abnormal growth, early or late pubertal development, adrenal disorders, disorders of sex development, diabetes, and gender non-conforming adolescents.

Dr. Diaz is board certified in both general pediatrics and pediatric endocrinology. He is a member of the Endocrine Society and Pediatric Endocrine Society. Dr. Diaz has been published in numerous medical journals and presented at conferences both nationally and globally. He has also contributed chapters to medical textbooks and frequently provides commentary to the media as a subject-matter expert. 

Dr. Diaz is employed by Nicklaus Children’s Pediatric Specialists (NCPS), the physician-led multispecialty group practice of Nicklaus Children’s Health System. He is bilingual in English and Spanish.

The Division of Pediatric Endocrinology at Nicklaus Children's Hospital offers a complete array of diagnostic, treatment and consulting services for infants, children and adolescents with endocrine disorders. The care team is dedicated to fulfilling the medical and support needs of children and their families through a multidisciplinary approach that has helped children from around the world. The program is proud to be consistently ranked among the best in the nation for pediatric endocrinology and diabetes care by U.S. News & World Report. Consultations with the division’s board-certified endocrinologists are offered at the hospital’s main campus near Coral Gables, as well as at select Nicklaus Children’s outpatient centers situated from southern Miami Dade to Martin counties..


Ramsey, J.T., Li, Y., Arao, Y., ..., Diaz, A., et al (2019). Lavender Products Associated With Premature Thelarche and Prepubertal Gynecomastia: Case Reports and Endocrine-Disrupting Chemical Activities. Journal of clinical endocrinology and metabolism , 104(11), 5393-5405. View in Pubmed

Diaz, A., Luque, L., Badar, Z., Kornic, S., Danon, M. (2016). Prepubertal gynecomastia and chronic lavender exposure: report of three cases. Journal of Pediatric Endocrinology & Metabolism, 29(1), 103-107. View in Pubmed

Mejia, J.D., Cervantes, L., Puerta, H., Bauer, M., Diaz, A. (2014). Neonatal diagnosis of a patient with hypoparathyroidism, sensorineural deafness and renal dysplasia (HDR) syndrome associated with cerebral infarction. Journal of Pediatric Endocrinology & Metabolism, 27(9-10), 961-965. View in Pubmed

Diaz, A., Lipman Diaz, E.G. (2014). Hypothyroidism. Pediatrics in Review, 35(8), 336-347. View in Pubmed

Patni, N., Diaz, E.G., Cabral, M.D., Siqueira, L.M., Diaz, A. (2014). Worsening hypertriglyceridemia with oral contraceptive pills in an adolescent with HIV-associated lipodystrophy: a case report and review of the literature. Journal of Pediatric Endocrinology & Metabolism, 27(11-12), 1247-1251. View in Pubmed

Granados, A., Diaz, A., Eng Charis, M. (2013). Brothers with germline PTEN mutations and persistent hypoglycemia, macrocephaly, developmental delay, short stature, and coagulopathy. Journal of Pediatric Endocrinology & Metabolism, 26(1-2), 137-141. View in Pubmed

Rodriguez, M.A., Malvezzi, L., Diaz, A. (2013). Conn's syndrome and Crohn's disease in a pediatric case: an interesting parallel. Journal of Pediatric Endocrinology & Metabolism, 26(1-2), 155-159. View in Pubmed

Patni, N., Cervantes, L., Diaz, A. (2012). Elevated alpha-feto protein levels in Van Wyk Grumbach Syndrome: a case report and review literature. Journal of Pediatric Endocrinology & Metabolism, 25(7-8), 761-767. View in Pubmed

Hogg, J., Diaz, A., Del Cid, M., Mueller, C., Lipman, E.G., Cheruvu, S., Chiu, Y.L., Vogiatzi, M., Nimkarn, S. (2012). An after-school dance and lifestyle education program reduces risk factors for heart disease and diabetes in elementary school children. Journal of Pediatric Endocrinology & Metabolism, 25(5-6), 509-516. View in Pubmed

Lizardo, A.E., Diaz, A. (2011). Sobrepeso y Obesidad Infantil (Childhood Overweight and Obesity) . Revista Médica de Honduras, 4(), 208-213.

Khatib, Z., Naqvi, A., DeAngulo, G., Diaz, A. (2011). Novel approaches to treatment of embryonal tumor with abundant neuropil and true rosettes. Pediatric Blood & Cancer, 56(6), 964.

Diaz, A., Bandhari, S., Sison, C., Vogiatzi, G.A. (2008). Characteristics of children with premature pubarche in the New York Metropolitan area. Hormone Research, 70(3), 150-154. View in Pubmed

A physician identified with a Nicklaus Children’s Pediatric Specialists logo is an employee of Nicklaus Children's Health System. All other physicians listed on the website are in private medical practices.