Denial Code CO-22 is a healthcare claim denial indicating that another insurance plan may be responsible for payment under Coordination of Benefits (COB) rules.
The official description of denial code CO-22 is: “The healthcare service may be covered by another payer per coordination of benefits.”
CO-22 commonly occurs when a patient has dual insurance coverage, and the payer processing the claim determines it is not the primary payer.
This denial signals that the claim must be billed first to the correct primary insurer, such as Medicare or an employer-sponsored health plan, before secondary coverage can be applied.
CO-22 is a payer-level determination used to prevent duplicate reimbursement and enforce proper insurance payment sequencing.
What is Coordination of Benefits (COB)?
Coordination of Benefits (COB) is a process used by insurers when a patient is covered by more than one insurance plan. The goal is to determine which insurance company is the primary payer (the insurer that pays first) and which is the secondary payer (the insurer that pays second).
The reason for this is to ensure that the total amount paid for the service doesn’t exceed 100% of the billed charges, preventing overpayment or duplicate payment.
For example:
- Suppose a patient has Medicare as primary and a private insurance policy as secondary. In that case, Medicare will pay first, and the private insurer may pay the remainder, subject to its own coverage rules.
- If both plans are from private insurance companies, the primary insurer is determined by each insurance provider’s guidelines, or based on the patient’s policy enrollment rules.
Common Reasons for Denial Code CO 22
Several scenarios can trigger a CO-22 denial. Here are the most common reasons:
1. The Patient Has Dual Coverage
If the patient has more than one insurance plan such as through their employer and a spouse’s employer CO-22 could be issued. In these cases, the insurance companies need to coordinate to determine which one is primary and which is secondary.
2. Incorrect Primary and Secondary Insurance Information
If the wrong insurance company is listed as primary, the payer might deny the claim under CO-22. This often happens when the insurance company that should be primary is not identified correctly on the claim form.
3. Missing or Incorrect Coordination of Benefits Information
If the claim lacks coordination of benefits (COB) details or if it’s submitted without the proper sequence of insurers, it can result in a CO-22 denial. This can happen if one insurer’s benefits are not coordinated with the other, or if one plan is not listed as the primary payer.
4. Outdated or Inaccurate Insurance Information
Sometimes, outdated or incorrect insurance information may be the cause of a CO-22 denial. For example, if the patient has changed employers or updated their coverage, but the new insurance information hasn’t been reflected in the billing system, the claim could be denied.
How to Resolve a CO-22 Denial Code
While a CO-22 denial can be frustrating, it is often straightforward to resolve once you understand how to handle coordination of benefits (COB). Here are the steps to resolve it:
1. Verify the Patient’s Insurance Information
Start by confirming that the insurance information provided for the patient is up-to-date. Check that you have accurate details for both the primary and secondary insurers. Ensure that the primary insurance is listed first on the claim form.
If there’s a discrepancy, contact the patient to verify their insurance coverage and update your records accordingly.
2. Obtain COB Information
If the patient is covered by two insurance plans, it’s essential to have the coordination of benefits (COB) information. This should include the following:
- The primary insurance carrier.
- The secondary insurance carrier.
- Any additional documentation (like the explanation of benefits or EOB) from the primary insurance.
Make sure that both insurance companies have the correct COB information, so they can properly coordinate payment.
3. Correct the Claim and Resubmit
Once you have confirmed the patient’s dual coverage and gathered the necessary COB details, correct the claim and resubmit it with the appropriate information. In some cases, the denial might be due to the insurance not recognizing the sequence of payments.
- Check the sequence of insurers: If you mistakenly listed the secondary insurance as primary, correct the order and submit the claim again.
- Submit necessary COB documentation: If required, include the COB information from the primary payer with your resubmission to ensure the secondary insurer is aware of the situation.
4. Contact the Insurance Companies
If the CO-22 denial remains unresolved, you may need to contact the payer directly for clarification. Call the insurance company’s claims department and ask for assistance in determining which insurer is responsible for the payment. They may need more information from the patient or you to process the claim correctly.
5. File an Appeal
If after correcting the information, the claim is still denied, you may need to file an appeal. Be sure to include all relevant documentation, such as:
- Proof of primary insurance coverage.
- Explanation of Benefits (EOB) from both insurers.
- Corrected claim form.
The appeal should clearly explain the patient’s coverage details and why you believe the claim should be processed under the coordination of benefits.
Prevention Tips to Avoid CO-22 Denials
While CO-22 denials can happen, there are steps you can take to prevent them:
1. Verify Insurance Coverage Early
Always verify the patient’s insurance coverage as early as possible. When you check eligibility, confirm whether the patient has dual coverage. Knowing this ahead of time will allow you to gather and document all relevant coordination of benefits details before submitting the claim.
2. Use Accurate Claim Forms
Ensure that the claim forms are filled out correctly. Pay particular attention to listing the primary insurer first and the secondary insurer second. Inaccurate information can lead to CO-22 denials.
3. Stay Updated on COB Guidelines
Insurance companies sometimes update their coordination of benefits rules. Stay in contact with the insurers you work with and make sure you are following their latest guidelines for submitting dual coverage claims.
4. Communicate with Patients Regularly
Make sure your patients keep you informed about any changes to their insurance coverage. Ask them to notify you of any updates, such as a change in employment, insurance provider, or dependent coverage status.
Final Thoughts
The CO-22 denial code is often linked to the coordination of benefits when a patient has multiple insurance plans. By verifying insurance coverage, correcting the claim form, and resubmitting it with the correct COB information, you can quickly resolve this issue. A disciplined denial management approach helps keep COB errors from impacting reimbursement timelines.
