Agencies listed below are providers of mental health services that receive funding from the Nassau County Department of Mental Health, Chemical Dependencies and Developmental Disabilities Services. For a complete list of mental health providers in Nassau County please go to the Directory of Mental Health Services for Children and Adults.

Abilities, Inc.
Angelo J. Melillo Center for Mental Health   
Catholic Charities Diocese of Rockville Centre 
Central Nassau Guidance and Counseling Services, Inc.
Family Residences & Essential Enterprises 
Family and Children’s Association 
Federation Employment and Guidance Service
Hispanic Counseling Center
Long Beach Medical Center – Behavioral Health 
Long Island Advocacy Center 
Long Island Counseling Center 
LIFT Long Island Families Together
Mental Health Association of Nassau County 
Mercy Medical Center – Behavioral Health 
MTI Residential Services, Inc
Nassau/Suffolk Law Services

Nassau University Medical Center
National Alliance on Mental Illness
NAMI Long Island Regional Council
NAMI North Shore
NAMI Queens / Nassau
NAMI Southwest Nassau NY
North Shore – Long Island Jewish Health System – Mental Health Information 
North Shore – Long Island Jewish Health System – Member Hospitals 
North Shore Child & Family Guidance Center  
Peninsula Counseling Center
Roosevelt Counseling and Resource Center  
South Nassau Communities Hospital – Behavioral Health
South Shore Association for Independent Living
South Shore Child Guidance Center
The Rehabilitation Institute