Dr. Mercedes Castiel
Physician & Cancer Survivorship Specialist | Founder & CEO, The Cancer Care Concierge
About
I’m a physician dedicated to cancer survivorship and patient advocacy, supporting people through every stage of the cancer journey.

I’m the founder and CEO of The Cancer Care Concierge, a boutique practice through which I support people of all ages, at every stage of the cancer journey and with any diagnosis. I founded it on a simple belief: no one should face cancer alone. Working alongside each client’s chosen medical team, I provide personalized advocacy, guidance, and clinical expertise through a high-touch care model — translating complex information, anticipating every step, and offering steady, compassionate support.

As Head of General Gynecology at Memorial Sloan Kettering Cancer Center, I created one of the earliest cancer survivorship programs in the United States. I’ve since held academic appointments at MSKCC, NYU Langone Health (Director of Women’s Survivorship), and the University of Chicago (Director of Women’s Cancer Survivorship). I’m certified in cancer risk genetics, and my research interests include menopause management and women’s health.

I earned my medical degree from the University of Toronto, where I also completed my residency in obstetrics and gynecology. I’ve served on The Menopause Society’s Education Committee and ASCO’s Health Equity and Outcomes Committee, and I continue to serve on ASCO’s Survivorship Task Force. I was a Visionary of the Year candidate for the 2026 Blood Cancer United (formerly the Leukemia & Lymphoma Society) campaign and received the United in Mission Award at this year’s gala.