NAMI of Westchester Return to Directory Description: NAMI, the National Alliance on Mental Illness, is the nation’s largest grassroots mental health organization dedicated to building better lives for the millions of Americans affected by mental illness.Website: http://www.namiwestchester.orgPhone: 914 592-5458Address: 100 Clearbrook Rd # 181City: ElmsfordNY10523Categories: All, Civic Organizations, Health & Well-Being November 6, 2017 5:18 pm | by TanyaDirectory Categories: All, Civic Organizations, and Health & Well-Being.