Aaron is most passionate about the mental healthcare of older adults, specifically increasing access to care for those struggling with neurocognitive disorders and mental illness in late life.
Dr. Greenstein earned his BA in biology from Yeshiva University and his MD from New York Medical College. He completed his fellowship in geriatric psychiatry at Mass General Brigham, and prior to that, completed general psychiatry residency at the Harvard South Shore Psychiatry Residency Training Program, an affiliate of the VA Boston Healthcare System and Harvard Medical School. During his final year of residency, he served as the Chief Resident of Geriatric Psychiatry at Mclean Hospital and a Health and Aging Policy Fellow in the United States Department of Health and Human Services.