Contact Info

Premier Medical Group

400 Westage Business Center Drive,        Suite 205
Fishkill, NY 12524

(845) 896-0008

(845) 896-2241


C. Ranjan Nath, M.D.

Endocrinologist, Fishkill


Dr. C. Ranjan Nath is an internationally renowned medical thought-leader, clinical scholar, and dually board-certified physician specializing in Endocrinology, Diabetes & Metabolism, whose purview also encapsulates cardiovascular risk factors.

With a professional career spanning over 25 years and offices across Westchester and Dutchess County, Dr. Nath is widely regarded as one of the nation’s leading endocrinologists.

In 2005, Dr. Nath founded the Diabetes & Metabolism Center at Phelps Memorial Hospital of Northwell Health in Westchester County, NY. At Phelps Hospital, Dr. Nath served as Medical Director and Chief of Endocrinology for over a decade. Under his leadership, Dr. Nath was instrumental in the strategic expansion of the center, establishing one of the country’s largest diabetic patient bases and tending to the cardiometabolic complications of well over twenty thousand unique endocrine patients.

Prior to his tenure at Phelps, from 1995 to 2005, Dr. Nath led Mount Sinai Beth Israel Hospital’s endocrinology practice spanning Westchester County to New York, New York, with a primary office on the Upper East Side of Manhattan.

Before transitioning to patient care, between 1992 to 1995, Dr. Nath was a clinical scholar at one of the world’s foremost biomedical research institutions, The Rockefeller University in New York, New York, and ultimately led the University’s Lipid Clinic. Throughout his time at The Rockefeller University, Dr. Nath actively mentored and educated the next generation of physicians at Weil Cornell Medical Center and Memorial Sloan Kettering. Publishing numerous peer-reviewed articles during his years at the Rockefeller, Dr. Nath’s scientific research assessed both the prevalence and management of cardiovascular risk factors in type 2 diabetics.

On June 18th, 2009, the American Diabetes Association, in conjunction with Westchester County New York’s Board of Legislators, honored Dr. Nath at the Tappan Hill Mansion, presenting him with the American Diabetes Lifetime Achievement Award and his very own day, “Dr. Nath Day,” to be celebrated annually on June 19th in Westchester County in recognition of Dr. Nath’s vast contributions to society as a preeminent physician, community leader, and philanthropist.

Select Accolades

  • American Diabetes Association Lifetime Achievement Award
  • Dr. Nath Day (June 19) Proclaimed by the Westchester County, New York Board of Legislators
  • MSNBC TV HOPE Global Forums: Diabetes and Obesity Keynote Speaker
  • Listed in the Marquis ‘Who’s Who in the World’ in the Field of Medicine

area of expertise

  • Diabetes Mellitus (Type 1 and Type 2)
  • Thyroid Disease
  • Obesity
  • Lipid Disorders
  • Hypertension
  • Pituitary Disorder
  • Polycystic Ovary Syndrome (PCOS)
  • Osteoporosis
  • Hypogonadism

board certification

  • Endocrinology and Metabolism
  • Internal Medicine


Clinical Research
Rockefeller University, New York, New York

Dalhousie University, Halifax, Nova Scotia

Memorial University of Newfoundland, Canada

Medical School
Kasturba Medical College – Manipal