Dr. Medina graduated from the Pedro Henriquez Ureña National University in the Dominican Republic in 1985. He then completed an Internship and Residency in Internal Medicine at the Oncology Institute Department of Health, and the Salvador B. Gautier Hospital (affiliated with the Autonomous University of Santo Domingo) in Santo Domingo, Dominican Republic. In order to further his training, he moved to Brooklyn, New York, where, from 1988 to 1991, he completed an Externship, Internship and Residency in Internal Medicine at the State University of New York Health Science Center in Brooklyn. From 1992 to 1995 he completed two Fellowships, one in Pulmonary and the other in Critical Care, and was later named Chief Fellow of Pulmonary at that institution.

Dr. Medina also worked as an attending physician at Kings County Hospital, University Hospital and VA Hospital from 1991 to 1995, and as a Clinical Instructor of Medicine, teaching both students and medical residents at the State University of New York.

During his Fellowship in Pulmonary he was exposed to Sleep Disorders which later became the foundation of an avid passion for assisting individuals with respiratory sleep disorders.

Dr. Medina is Board Certified in Internal Medicine, Pulmonary Medicine, and Critical Care Medicine. He is a Fellow of the American College of Chest Physicians and American College of Physicians and serves as member of the American Academy of Sleep Medicine, American Thoracic Society, Society of Critical Care Medicine, American Medical Association and Medical Association of Georgia. He has been awarded Physician of the Year by the NRCC on several occasions and holds a life membership in Who's Who Among Professionals.