 Callen-Lorde is the only primary care center in New York City created specifically to serve LGBTQ communities.Callen-Lorde's grassroots heritage dates back nearly 50 years to the St. Mark's Community Clinic and the Gay Men's Health Project, two volunteer-based clinics that provided screening and treatment for sexually-transmitted diseases.These clinics merged in 1983 to form Community Health Project, a mostly volunteer-staffed, episodic care program housing the nation's first community-based HIV clinic.