Contact Us

For eligibility or benefit questions, authorization information, or claim status, please contact customer service or login to the provider portal at

Your Allegiance account profile will be updated to include this email address for communication purposes. Please contact Customer Service if you do not wish your account to be updated.

Please choose a department option other than CAA Disputes in order to submit contact form. For CAA negotiation and independent dispute resolution inquiries please contact Multiplan at 888-593-7427 or email to

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Our Locations

Allegiance Benefit Plan Management, Inc.
2806 S. Garfield St.
P.O. Box 3018
Missoula, MT 59806
Toll-Free: 800-877-1122
Fax: 406-523-3111
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Allegiance COBRA Services, Inc.
2806 S. Garfield Street
P.O. Box 2097
Missoula, MT 59806-2097
Toll-Free: 800-259-2738
Fax: 406-523-3131
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Allegiance Life & Health Insurance Company, Inc.
2806 S. Garfield St.
P.O. Box 3507
Missoula, MT 59806-3507
Phone: 406-523-3122
Toll-Free: 800-737-3137
Fax: 406-523-3124
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Allegiance Advantage Reimbursement Accounts
P.O. Box 4346
Missoula, MT 59806
Toll-Free: 877-424-3570
Automatic Voice Response System available 24/7
Fax: 877-424-3539
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Participant Q&A
Allegiance Care Management
2806 S. Garfield Street
P.O. Box 2339
Missoula, MT 59806-2339
Case Management
Toll-Free: 877-792-STAR (7827)
Fax: 406-532-1502
Utilization Management
Toll-Free: 800-342-6510
Fax: 406-532-1501
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Other locations: Billings, MT | Helena, MT | Tualatin, OR | Plano, TX