Access Behavioral Health Services


You may be eligible for behavioral health services if you meet the following 3 criteria:

  1. Reside in Thurston or Mason County,
  2. Have a chronic or serious mental illness and/or substance use disorder (this is determined through an assessment process with one of our contracted providers), and
  3. Have Medicaid benefits (known as Apple Health).

To sign up for Medicaid, please visit the following link:  Sign up for Medicaid

You may also be eligible if you are low-income and are not eligible for Medicaid. (Services are limited)


The following are some of the services that are available. If you are a Medicaid enrollee, please click here to see the complete Benefit Handbook.

  • Crisis Intervention
  • Outpatient Mental Health
  • Outpatient Substance Use Disorder
  • Inpatient Mental Health
  • Substance Use Disorder Residential
  • Withdrawal Management (detox)

For Medicaid enrollees, the above services are free of charge to you when provided by a Thurston-Mason Behavioral Health Organization (TMBHO) contracted provider. Enrollees also have the right to change behavioral health care providers at any time for any reason.

Call our customer service line at 360-763-5828 or 800-658-4105 or one of our contracted providers if you have questions.


There are four steps to getting behavioral health services:

  1. Call a behavioral health provider
    Call one of the providers and ask for behavioral health services.  The behavioral health provider will give you an appointment time for an assessment interview.
  2. Assessment interview
    The assessment appointment includes a behavioral health history and questions about your health, your family, and your current living arrangement. With this information the behavioral health provider will be able to identify what type of behavioral health services will best meet your needs. The behavioral health provider will fill out a form that will be submitted to Thurston-Mason Behavioral Health Organization (TMBHO) for approval.
  3. BHO review
    Thurston-Mason Behavioral Health Organization will review your behavioral health diagnosis and decide if you are eligible to receive publicly funded behavioral health services.
  4. Notification
    If Thurston-Mason Behavioral Health Organization decides that you are eligible for publicly funded behavioral health services, you will be contacted and a first appointment for your treatment services will be set up.  Our goal is to meet with you and begin treatment within 10 working days of your assessment interview.

If it is decided that you are not eligible for publicly funded behavioral health services, you will be sent a letter explaining why we declined your request for services.  This letter will also contain suggestions for getting help from other services.

If you or someone you know has questions, please call our customer service line at 360-763-5828 or 800-658-4105 or one of our contracted providers if you have questions.

For additional information, answers to the following questions, and benefit coverage, please see the Benefit Handbook 

  • Who is eligible for publicly-funded behavioral health services (mental health and substance use)
  • What happens at an intake evaluation
  • What to do if you need to be in a hospital for mental health care
  • Your rights as a person receiving behavioral health care services
  • How to choose a behavioral health provider
  • How to access medical care that is covered by Medicaid
  • What to do if you get a bill
  • What to do if you need transportation
  • Mental Health Advance Directives
  • Early and Periodic Screening, Diagnosis, and Treatment (EPSDT) for Children
  • What to do if you are not happy with your services
  • What a mental health Ombuds is and how to contact them



First, it’s important to understand addiction, and treat it with the same urgency as any other chronic and disabling disease. Anyone can develop addiction, but some people are at higher risk, such as those with a family history, and people who begin using alcohol or other drugs before their bodies and brains are developed. Next, help loved ones see that they need help, hold them accountable, and support them throughout treatment. More tips for intervening can be found in this guide: Helping someone who might have a drug or alcohol problem.


The Confederated Tribes of the Chehalis Reservation
Behavioral Health
420 Howanut Rd, Oakville, WA  98568

Nisqually Indian Tribe Substance Abuse and Mental Health
4816 She-Nah-Num Dr SE, Olympia WA 98513

Skokomish Indian Tribe Behavioral Health
80 N. Tribal Center Road, Skokomish WA 98584

Squaxin Island Tribe Behavioral Health
100 SE Whitener Road, Shelton, WA  98584

For additional information regarding Apple Health benefits for American Indians and Alaska Natives (AI/AN), visit