Mount Vernon Family Mental Health Clinic, 6 Gramatan Avenue, Mount Vernon, NY 10550. Mount Vernon Family Mental Health Clinic is a mental health clinic operated by Westchester Jewish Community Services (WJCS). For more information, please see the WJCS website at http://www.wjcs.com/index.php?src=gendocs&ref=MentalHealthClinics&category=Adults%20and%20Families.