For information about eligibility, benefits, pre-certification and claims status, please contact your insurance company – not InterWest. The phone number for your insurance company can be found on the back of your ID card.

Corporate Office:

2809 Great Northern Loop, Suite 400
Missoula, MT 59808
e-mail: info@interwesthealth.com

Phone:
Toll Free:
Fax:

(406) 542-1912
(877) 542-1912
(406) 542-8350

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