Mental Health Association of Westchester Clinic, 300 Hamilton Avenue, Suite 201, White Plains, NY 10601. The Mental Health Association of Westchester has a clinic in White Plains, NY, that provides outpatient mental health treatment for children and adults, across the age span. Treatment can include individual as well as family sessions. The clinic is described as a suite of office spaces. The clinic is in an office building in downtown White Plains, accessible by car or by public transportation. For an initial evaluation appointment, please call the Mental Health Association of Westchester’s central intake phone number at (914) 345-7350. For more information, please see the Mental Health Association of Westchester website at www.mhawestchester.org.