Allegiance is the State Plan's third party administrator. That means Allegiance processes claims and payments, provides customer service, and sends Explanation of Benefits (EOB) to members showing what has been paid to providers and what the member's portion of the cost is. We use Allegiance's network of Montana providers and Cigna's large nationwide network for providers outside Montana. Using in-network providers is the best way to control how much you have to pay out of pocket for health care.
PO Box 3018 Missoula, MT 59806
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