Dr. Johnston is Associate Director of Mount Sinai’s Comprehensive Health Program – Downtown.
Board certified in Internal Medicine, Dr. Johnston has been treating HIV/AIDS patients since 1983. She joined St. Vincent’s Medical Center in 1997 as the Associate Director of Ambulatory HIV and soon became director of that program. She began the HIV Quality Management program in 1998. Dr. Johnston has been a member of the State AIDS Institute Quality Advisory Committee since 2000 and co-Vice Chair of the committee since 2007. She is a member of the State Medical Criteria Committee, which sets the standards for HIV care in New York. She was chair of the Ambulatory Care Committee at St. Vincent’s that was the steering body of ambulatory services. She is a PI on multiple studies including an intervention to reduce unsafe drinking, independent research on Hepatitis C and Syphilis, and on several drug studies including investigational use of raltegravir. She has frequently given lectures for the AETC and provides updates for numerous national and international conferences. In May 2010, she joined Mount Sinai as an Associate Professor of Medicine and co-directs the Mount Sinai Comprehensive Health Program at the Downtown campus.