Dr. Kostelanetz serves as the Associate Director of the Division of Internal Medicine and Medical Director for the Nostrand Clinic at Maimonides. Dr. Kostelanetz is a board-certified Internal Medicine and Pediatrics physician with expertise in population health, quality improvement, and implementation science. She earned her undergraduate degree, MD, and MPH at Tufts University, during which time where she spent two years working with Partners In Health on health systems strengthening and quality improvement in Haiti and West Africa.

She completed Internal Medicine–Pediatrics residency at Vanderbilt University Medical Center, followed by an AHRQ-funded postdoctoral fellowship focused on population health, quality improvement, and implementation science. Her research centers on social and structural determinants of health, health disparities, and interventions to improve chronic disease management and access. Her work has been recognized with multiple awards, including the 2021 VUMC Martin Luther King, Jr. Day Award, the 2020 VUMC Office of Health Equity Innovation Award, and selection as a 2020 Lipkin Award finalist by the Society of General Internal Medicine.

Dr. Kostelanetz has held national and local leadership roles advancing population health, including as a Cambridge Health Alliance Center for Health Equity Education and Advocacy Scholar and Faculty member, and as co-lead of the Renal Equity Group for the NYC Department of Health Coalition to End Race Corrections in Clinical Algorithms since 2021. She previously served as Physician Liaison for Health Equity at the Tennessee Department of Public Health, where she led statewide health equity data initiatives and helped develop Tennessee’s first quality incentive program for Federally Qualified Health Centers and safety-net clinics.

Prior to joining Maimonides, Dr. Kostelanetz served as Health Equity Lead at One Brooklyn Health, where she led initiatives including the Kidney Transplant Access Program, Lung Cancer Screening Program, and universal social determinants of health screening, among others. She has served as principal investigator on multiple grants in partnership with NYC DOH focused on improving chronic disease care and access, as well as residency training.