Coordination of Benefits
Coordination of benefits (COB) is a crucial process in health insurance that ensures patient families don't receive duplicate payments for covered services when they have multiple plans. COB rules determine which plan is "primary" and how much each plan contributes to covering expenses. This occurs when there is additional health insurance coverage through your spouse, another employer or a government-sponsored program (Medicaid, Medicare or Medical Assistance).
Why is Coordination of Benefits important?
Reduces your out-of-pocket costs

By preventing duplicate payments for the same medical services, COB ensures you don't get stuck with unexpected bills.
Increases transparency

By clarifying which plan is responsible for what, COB helps patient families understand their benefits and make informed decisions about their healthcare expenses.
Ensures complete coverage

COB ensures you receive the full benefits you're entitled to from all your plans, maximizing your coverage.
Avoids confusion and delays

By clarifying which plan pays first, COB prevents delays in receiving care or reimbursements.
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How do I complete Coordination of Benefits?
Completing coordination of benefits information online depends on your insurance plan and what options they provide. For your convenience, we have listed contact information for many of the most common health plans:
Blue Cross Blue Shield
By phone: 1-800-451-0287
COB form - Complete and submit the web formHumana
By phone: 1-866-427-7478
United Healthcare
By phone: 1-866-801-4409
COB form – complete and fax to 801-567-5498 or mail to the address on the back of your member ID cardAetna
By phone: 1-877-512-0363
COB form – complete and fax to 866-474-4040 or mail to:Aetna
P.O. Box 981106
El Paso, TX 79998-1106Cigna
By phone: 1-800-244-6224
COB Form - Complete and mail the form to the address on the back of your member ID card
COB Form (Behavioral Health Services Only) - Complete and mail the form to the address on the back of your member ID card
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How do I contact my insurance company regarding coordination of benefits?
Your insurance company may have different methods for contacting them regarding coordination of benefits. The most common methods are by phone, online portal, mail or fax.
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What happens if I do nothing?
If the coordination of benefits status is not updated, it is possible your insurance company will refuse to pay any claims. They may identify the amount owed as patient responsibility, leaving you with the full balance for your visit(s). Complying with your insurance company’s coordination of benefits request will save you time and prevent confusion between you, your insurance company and healthcare provider.