Dr. Tania Dempsey, MD, ABIHM is Board-Certified in Internal Medicine and Integrative and Holistic Medicine. She received her MD degree from The Johns Hopkins University School of Medicine and her BS degree from Cornell University.  She completed her Internal Medicine Residency at New York University Medical Center. In 2011, she founded her own Integrative medicine practice which has evolved into AIM Center for Personalized Medicine, a destination Medical Center in Purchase, NY, focusing on complex, multi-system diseases. Dr. Dempsey is a leading expert in MCAS, Mast Cell Activation Syndrome, Dysautonomia, ME/CFS, (Myalgic encephalo-myelitis/chronic fatigue syndrome), Tick-Borne Infections and Autoimmunity. She is an accomplished international speaker and writer and is well published in the medical literature on topics related to MCAS.  She was involved in a research study in collaboration with the TILT (Toxicant Induced Loss of Tolerance) team at University of Texas Health Science Center in San Antonio, which led to the publication: Mast cell activation may explain many cases of chemical intolerance. Her most recent paper from January 2022 is titled “Post-HPV-Vaccination Mast Cell Activation Syndrome: Possible Vaccine-Triggered Escalation of Undiagnosed Pre-Existing Mast Cell Disease?”.