How to request a coordination of benefits?

Common Coordination of Benefits (COB) mistakes involve mixing up the payment order or entering incorrect patient insurance details, which accounts for a large share of insurance claim denials.

Billing Secondary Insurance Too Early

• Billing before primary payment: Submitting a claim to the secondary insurance before receiving the Explanation of Benefits (EOB) from the primary payer results in an automatic denial (such as denial code PR-22).
• Reversing the order: Routing a claim to the secondary policy first instead of the primary policy causes immediate rejections (such as denial code CO-22).

Front-Desk and Registration Errors

• Missing dual coverage: Failing to ask patients during intake if they have secondary insurance via a spouse, a second job, or Medicare/Medicaid.
• Incorrect data entry: Entering wrong member IDs, misspelled names, or backward payer sequences during patient check-in.
• Outdated files: Not re-verifying active coverage status at the start of a new year or after a life event.

Calculation and Adjustment Errors

• Using a single fee schedule: Adjusting account balances based on only one insurance's allowed amount instead of evaluating both fee schedules together.
• Misinterpreting overpayments: Automatically refunding money or creating incorrect account credits when an insurance payment appears higher than expected due to complex COB rules.

For more tips on keeping claims clean, see the Best Medical Billing Guide.

You can update your insurance details or complete requests directly through your provider's member portal, such as the Blue Cross Blue Shield of Michigan COB Portal.

A Coordination of Benefits (COB) form tells insurance companies which plan pays first when you have more than one health policy. You must fill out and return this form so your medical claims do not get delayed or denied.

Information Needed Before You Start

• Your member ID and group number from your main insurance card.
• The names, dates of birth, and Social Security numbers for you and any family members.
• Policy numbers, company names, and phone numbers for any second insurance plan (like a spouse's plan or Medicare).
• Details on employment status or effective dates for the secondary policy.

Steps to Fill Out the Form

1. Provide Personal Details: Fill in your name, policy number, and contact info as listed on your primary insurance card.
2. Indicate Other Coverage Status: Check "Yes" if you or your dependents have secondary coverage, or check "No" if you only have one health plan.
3. Add Secondary Policy Data: If you checked "Yes," write down the secondary insurance company's name, address, policy number, and the name of the policyholder.
4. List Effective Dates: Write down the exact date the other insurance started or stopped.
5. Sign and Date: Sign the document physically or electronically to verify the information is true.
6. Submit the Form: Mail, fax, or upload the completed form through your insurer’s online portal or mobile app. You can also call member services on the back of your insurance card to complete it over the phone.

Coordination of Benefits (COB) is the process insurance companies in Canada use to combine multiple benefit plans so you can receive up to 100% reimbursement for eligible health, dental, or prescription drug expenses without exceeding the total cost.

In Canada, most insurance providers—such as Canada Life, Manulife, and Alberta Blue Cross—follow standardized rules set by the Canadian Life and Health Insurance Association (CLHIA) Guideline G4 to keep the process consistent across the industry.

How the Process Works

1. Submit to the Primary Payer First: Send your medical or dental receipt to your own primary plan first. That insurer processes the claim and sends you an Explanation of Benefits (EOB) or payment statement.
2. Submit to the Secondary Payer Second: Take the statement and receipt copies from the first insurer and submit the remaining unpaid balance to your second plan (such as your spouse's plan).
3. Get Reimbursed up to 100%: The second plan evaluates the leftover amount and covers the remaining eligible balance, ensuring your total combined payout does not go over 100% of the original expense.

Order of Payment Rules (Who Pays First?)

Canadian insurance rules determine which plan is primary and which is secondary based on specific situations:

• Your Own vs. Spouse's Plan: Your own workplace benefits plan always pays first as the primary payer, and your spouse's plan acts as the secondary payer for your claims.
• Children's Claims (The Birthday Rule): For dependent children covered under both parents' plans, the plan of the parent whose birthday falls earlier in the calendar year (month and day) pays first.
• Dual Employment: If you work two jobs, your full-time employer's plan pays before a part-time plan. If both are equal, the plan you have belonged to the longest pays first.
• Students: A student's own individual or school-acquired plan pays first, followed by their parents' workplace plans.
• Retirees: If you have retiree benefits alongside a new job's health plan, the new active employment plan pays first, and the retiree plan pays second.

A coordination of benefits (COB) letter is a formal notice or questionnaire sent by an insurance company to a policyholder to find out if they have other health insurance coverage.

Purpose of a COB Letter

• Determine Primary Payer: It establishes which insurance plan pays first (primary) and which pays second (secondary) when someone has multiple policies (such as an employer plan and a spouse's plan, or Medicare).
• Prevent Overpayment: It ensures that combined payouts from different insurers do not exceed 100% of the total medical costs.
• Prevent Claim Delays: Responding to the letter prevents your medical claims from being delayed or temporarily denied by providers waiting on coverage verification.

What You Need to Do

• Review and Complete: Fill out the form or letter with details about any other active health insurance or state that you have no other coverage.
• Return Promptly: Submit the information back to the insurance company online, by mail, or by phone so your medical bills continue to process smoothly.
• Update Yearly: Many insurers require you to re-confirm or update these details annually.

The primary purpose of a coordination of benefits (COB) is to prevent duplicate payments and over-insurance when a person is covered by more than one health insurance plan.

Why Coordination of Benefits Matters

• Prevents Overpayment: It ensures that the total amount paid by all combined insurance plans does not exceed 100% of the actual medical expenses.
• Defines Payment Order: It establishes which insurer is the primary plan (pays first up to its policy limits) and which is the secondary plan (covers remaining costs up to its own limits).
• Lowers Costs: By sharing claims fairly between companies, it helps keep overall health insurance and prescription costs more affordable.

How the Payment Order Works

• Own Policy vs. Dependent: Your own employer-sponsored plan is generally primary over any plan where you are listed as a dependent or spouse.
• The Birthday Rule: For children covered under both parents' plans, the plan of the parent whose birthday falls earlier in the calendar year is usually primary.
• Active vs. Retired: Active employee coverage takes priority over retired or COBRA coverage.