Dr. Walerstein is Associate Chief Medical Officer and Senior Vice President for Medical Affairs for the Northwell Health. From 2005-2014 he served as the Executive Vice President for Medical Affairs of Nassau Health Care Corporation and the Medical Director of Nassau University Medical Center. Currently, he holds an appointment as Associate Professor for the Hofstra Northwell School of Medicine.
Dr. Walerstein is a board certified internist who has practiced both inpatient and ambulatory medicine over the past thirty years. His current interests include population health, models of health care delivery, cost-effective care and integrated primary care and mental health care delivery.