Coordination of Benefits After a Primary Plan Denial
Mr. S has employer coverage through his job (primary) and dependent coverage through his spouse's plan (secondary). On March 3 he underwent an outpatient procedure. The primary plan processed the claim on April 10 and denied the $1,480 charge as 'non-covered - experimental/investigational.' The EOB states the appeal deadline is 60 days from the date of the EOB. The secondary plan requires a copy of the primary EOB and an itemized statement and has a 180-day timely filing limit from the date of service. The practice's billing staff wants to write off the balance and bill the patient. The patient calls, upset about a statement he received. The procedure is FDA-approved and has supporting literature, but the primary's medical policy excludes it.
1. What is the correct coordination of benefits order, and what should the practice do next?
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The primary plan must be billed and must issue a determination before the secondary plan is billed. The primary has denied the service as non-covered, so the practice should not write off the balance or bill the patient yet. The next step is to appeal the primary denial within 60 days of the April 10 EOB, because the procedure is FDA-approved and there is supporting literature. The appeal should include a letter of medical necessity, the CPT code and description, FDA approval information, relevant literature, and the physician's documentation. If the primary overturns the denial, the claim is paid and the secondary is not needed. If the primary upholds the denial, the practice can then bill the secondary with the primary EOB and the itemized statement. The secondary's 180-day timely filing is measured from the March 3 date of service, so the practice must track that deadline carefully while the primary appeal is pending.
2. What documentation and deadlines must the practice track, and what happens if the secondary also denies?
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Track the primary appeal deadline (60 days from the April 10 EOB) and the secondary timely filing limit (180 days from the March 3 date of service). Obtain the primary EOB, the itemized statement, the operative note, and any medical necessity letter. The secondary may require the primary's denial reason and may have its own prior authorization or medical policy. If the secondary also denies, the practice should review the denial reason before billing the patient. If the secondary denies because the service is a benefit exclusion or because the patient did not meet the plan's criteria, the balance may be patient responsibility, but the patient should receive a clear explanation and the practice should verify network status and any hold-harmless provision. If the secondary denies for missing information, correct and resubmit rather than shift the balance. Do not bill the patient while a timely appeal or secondary claim is pending.
3. How should the patient be advised, and what financial responsibility rules apply?
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The patient should be told that the claim is in the primary appeal process and that the statement was generated prematurely. Explain that the practice is not writing off the balance and is not yet billing him while the appeal and secondary billing are pending. Provide the expected timeline and ask him to contact the practice if he receives another statement. If the primary and secondary both deny, the practice should explain the specific denial reason and the patient's appeal rights. The patient may be responsible for the balance if the service is a plan exclusion or if the secondary also determines it is not covered, but the practice should verify the plan's network and benefit rules first. If the patient has a hold-harmless protection because the service was authorized or the practice failed to obtain a required referral, the practice may have to absorb the balance. Document all patient communications.