Norman P. Spack is an American pediatric endocrinologist at Boston Children's Hospital, where he co-founded the hospital's Gender Management Service (GeMS) clinic in February 2007. It was America's second clinic to treat transgender children, modeled after a similar Dutch system. He is an internationally known specialist in treatment for intersex and transgender youth, and is one of the first doctors in the United States to advocate prescribing hormone replacement therapy to minors. Spack, who is Jewish, has been an advocate for transgender resources and support groups for the Jewish community.