About Us

Who We Are

Photo Credit: Kelli Lee

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.  

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.

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

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

Our Mission: Provide access to an effective, reliable safety net of behavioral health crisis and recovery support services throughout our region.