NYC Health + Hospitals/Kings County is located at 451 Clarkson Avenue (between New York and Albany Avenues), Brooklyn, NY 11203. For appointments, call 718-245-3325. For general information, call 718-245-3131. For Patients/Guest Relations, call 718-245-7418 or email: KingsPatientExperience@nychhc.org.. Visiting Hours.