Thurston Mason Behavioral Health Administrative Service Organization (TMBH-ASO) is governed by a Board of Directors consisting of County Commissioners from both Thurston and Mason.  

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TMBH-ASO contracts with Washington State Health Care Authority (HCA), Molina Health, Amerigroup, United Health, and Coordinated Care (for foster care only) to provide care to individuals in the two-county region who are experiencing a crisis due to a behavioral health disorder.

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Crisis services will be provided for those eligible for Medicaid (Apple Health) and all others, regardless of income or insurance status. 

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Thurston Mason BH-ASO may also provide a limited array of other behavioral health services for individuals not eligible for Medicaid.