TMBHO Contact Information

Customer Service:

If you are having difficulties understanding your benefits, have questions about your benefits, or questions regarding your services or how to access services, please contact us.

Phone: 360-763-5828 or 800-658-4105
Fax: 360-489-1435
TTY: 7-1-1 or 1-800-833-6388
Address: 612 Woodland Square Loop SE, Suite 401 Lacey, WA 98503

TMBHO Ombuds:

Phone: 360-763-5793
Fax: 360-584-9745
TTY: 7-1-1 or 1-800-833-6388

Compliance Hotline:

Phone: 1-800-867-7130
All calls are confidential unless you choose to identify yourself.

Public Records Request:

Please submit requests to:


Our office hours are 8am – 5pm Monday-Friday (excluding holidays).

We will be closed in observance of the following holidays:
May 27
July 4
September 2
November 11
November 28, 29
December 25