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Mental Health, Chemical Abuse and Dependency Services

Department of Community and Human Services

Mental Health, Chemical Abuse and Dependency Services Division
Chinook Building
401 Fifth Ave., Suite 400
Seattle, WA 98104

Jim Vollendroff, Dir.
e-mail us
Phone:  206-263-9000
Fax:   206-296-5260
TTY:   711 Relay Service

Employee Directory

Department: Community and Human Services
Adrienne Quinn, Director

Welcome to the King County Mental Health, Chemical Abuse and Dependency Services Division (MHCADSD)

We provide high quality mental health and substance use disorder services to low income individuals in need. Our division provides a wide variety of services including crisis services, mental health treatment, substance use disorder treatment, and diversion and reentry services. We offer services that are respectful, tailored to individual needs, and most of all, effective. The King County Mental Health, Chemical Abuse and Dependency Services Division is one of four divisions in the King County Department of Community and Human Services.

For your convenience, our website has recently been updated and divided into three separate sections that include the following:

Main Mental Health and Substance Use Disorder Section

Co-occurring treatment, Mental Illness and Drug Dependency Action Plan, Criminal Justice, Client Rights, HIPAA, and Legislative Priorities

Mental Health Section

Crisis Services, Community Mental Health Treatment, Client Rights, Employment, Housing, Client and Family Resources, Recovery, Advocacy, Mental Health Information, Tobacco Treatment and Frequently Asked Questions

Substance Use Disorder Section

Prevention, Intervention, Treatment, Community Organizing Program, Tobacco Treatment and Client Rights

Please also note the pages devoted to the activities of the King County Mental Health Advisory Board, and the King County Alcoholism and Substance Abuse Administrative Board. These citizen boards provide a vital link between county government and the community. Meeting agendas and meeting minutes are available as well as applications and application information. Anyone interested in serving on any of these boards is encouraged to explore those pages and consider applying and joining their efforts to improve and strengthen publicly funded mental health and substance use disorder services to the community.

Thank you for your interest in the Mental Health, Chemical Abuse and Dependency Services Division. Feel free to provide feedback about our new Web site at We look forward to hearing from you!

What's New 


19th Annual Mental Health and Substance Abuse Legislative Forum

Thursday, November 5, 2015
6:30 p.m. - 9 p.m.
Town Hall Seattle
1119 8th Avenue (at Seneca Street), Seattle

Please put the forum on your calendar, and spread the word to family, friends, neighbors, colleagues, clients, peers, board members, allies, and advocates. Everyone is welcome, and we are adding extra seating to enable even more community members to attend!

2015 Legislative Forum Flyer

Community Alternatives to Boarding Task Force (CABTF) Progress Report - June 2015

Cover Letter from Co-Conveners for CABTF Progress Report - June 2015

Trails to Treatment 2015

New: Behavioral Health Integration

County Response to August 2014 State Supreme Court Ruling on Single Bed Certification 

Improving Psychiatric Inpatient Placement to End Use of Single Bed Certification Due to Lack of Capacity (updated 2/9/15)

FAQs for Hospitals about King County’s New Evaluation & Treatment Placement and Single Bed Certification Processes (updated 2/9/15)

2015 State and Federal Legislative Priorities and Requests for Behavioral Health (updated 10/24/2014)