Rancho Santa Margarita Mental Health Clinic, California – Contact us now Home / Contact / Contact Rancho Santa Margarita Mental Health Clinic Rancho Santa Margarita Mental Health Clinic Address: 30211 Avenida De Las Banderas, Suite 200, Rancho Santa Margarita, California, 92688 Telephone: 949-490-6362 Direction:Map and Driving Directions Rancho Santa Margarita Mental Health Clinic Los Altos Clinic Los Angeles Clinic Sacramento Clinic Reviews