Dr. Martincic graduated from the New York College of Osteopathic Medicine in 1990 and has been practicing for over 20 years in medicine and nephrology. He completed Internship, Residency, and Fellowship training at Brookdale University Hospital and Medical Center, attaining the position of Chief Medical Resident.

Academic affiliations included Clinical Assistant Professor in Medicine at the New York Medical College, Adjunct Clinical Professor of Medicine at the New York College of Osteopathic Medicine, and more recently Clinical Instructor of Medicine at the State University of New York at Stony Brook.

He has held Medical Directorships in several dialysis units including Southampton Hospital Regional Dialysis Unit. He currently serves on the Pharmacy and Therapeutics Committee of the Mather-St. Charles Health Alliance and is Section Chief of Nephrology of St. Charles Hospital.

Dr. Martincic is board certified in internal medicine and nephrology.