Coordination of benefits (COB) programs have historically relied on post-pay recovery, and for good reason. Not all COB cases can be caught earlier.
Coordination of benefits in healthcare determines which payer is responsible when multiple insurance policies or coverages exist for a member. In most programs today, that determination happens after a claim is paid.
For a deeper overview, see what coordination of benefits is and how it works.
Now, payment integrity leaders are placing more weight on cost avoidance. A proactive approach reduces reliance on recovery and exposure to unrecoverable balances. This is because the correct payer is discovered before payment and claims are processed correctly the first time.
The strongest programs today address COB across all three stages of the claim lifecycle—pre-claim, pre-pay, and post-pay. This post focuses on how pre-pay works and where it fits in that connected model, but first, let’s look at post-pay.
A post-pay-only approach leaves value on the table
In a post-pay model, the review of other coverage happens after adjudication and payment. A claim is processed. Payment is issued. Other coverage is identified after payment. Investigation follows, and where possible, recovery.
Timing and recovery feasibility drive inefficiency. (For a deeper look at how timing affects both financial and operational outcomes, read COB Recovery Explained: How Detection Timing Shapes Financial and Operational Performance.)
This dynamic is also evident in broader payment accuracy data. CMS reports billions in improper payments across Medicare and Medicaid programs each year, including errors tied to eligibility and coordination issues, among other categories identified after payment.
Recovery timelines can extend for months depending on the case complexity and payer coordination requirements. And not all identified overpayments are recoverable.
In some cases, provider contract language prevents recoupment. In others, coverage changes are identified too late to meet recovery windows, or disputes prevent a full recovery of the amount paid.
Post-pay COB captures value. But it also creates a downstream workload and unrecoverable costs that could have been avoided if the claim had been coordinated correctly at the time of payment.
Post-pay shouldn’t be perceived as a failure, however, because it's a necessary backstop. The opportunity comes from shifting as much volume as possible to earlier stages, so post-pay handles a smaller, more targeted pool of cases. But shifting COB to a pre-pay model hasn’t always been simple.
Why pre-pay COB has been difficult to execute
A COB determination requires verified facts, not just matched data. Validation, outreach, and cross-payer confirmation all have to happen before a primacy decision can be acted on. Historically, that level of work has been difficult to complete within the time constraints of a pre-pay environment.
Federal requirements under the Medicare Secondary Payer framework require payers to determine the correct primary coverage based on verified information, and to do so within defined claims processing timeframes. The requirement is not to flag potential overlaps, but to make a determination that can support payment accuracy and compliance. That creates a constraint. Investigations must be complete, accurate, and fast.
In practice, that has been the limiting factor. Pre-pay COB has been difficult to scale because the industry has not had a reliable way to complete full primacy investigations within operational timelines. When investigations are incomplete, decisions rely on probability or partial data. When timelines are missed, claims must be paid without proper coordination.
Payers have experienced both outcomes. Either the process slows down and creates risk around prompt pay requirements, or it moves quickly but produces low-confidence results that cannot be acted on.
This is why many early pre-pay efforts have underperformed. The gap was not in identifying potential overlaps. It was in converting those signals into verified, timely decisions that could be applied before payment.
For more on that shift, see why payment integrity is moving toward pre-pay.
What makes pre-pay COB work
Pre-pay is where coverage determinations established through pre-claim investigation are applied at the claim level, before payment is released.
When pre-claim has already established primacy, pre-pay applies that determination at adjudication. When it hasn't, the investigation is completed—same day for most cases. Cases that can't be resolved before payment continue through post-pay recovery.
Pre-claim identification
Pre-claim COB focuses on early detection, monitoring for signals that indicate potential additional coverage.
Signals include:
- name changes,
- address changes,
- employer group changes,
- adding a dependent, birth, pregnancy indicators,
- Medicare eligibility, and
- disability status
When those signals appear, an investigation is initiated before a claim arrives. A verified primacy determination corrects the member's record. So every future claim for that member adjudicates correctly without additional review.
Pre-payment claims review
Pre-pay COB begins after adjudication and before payment. When other coverage is confirmed, the claim is routed correctly. Straightforward cases are resolved on the same day. Cases that require validation through outreach use a defined claim payment pend window, typically around 48 hours.
What this approach looks like operationally
Pre-pay review runs on a daily claims feed. Claims are evaluated for coordination of benefit opportunities, and confirmed cases are resolved within the payment window. Cases that cannot be resolved before payment continue through post-pay workflows.
The role of education in pre-pay COB
Pre-pay COB works best when payers, providers, and members are all working from the same correct coverage information. When primacy changes before a claim is processed, the primary payer may not be aware. The provider may bill the secondary payer as primary.
Proactive communication helps to ensure the provider bills the correct primary payer on the first attempt, ultimately reducing confusion, rebilling, and avoidable friction for everyone involved.
For a broader look at operational complexity in pre-pay programs, see Prepayment Review Isn’t New, So Why Has It Been So Hard to Operationalize?
What a complete COB program can achieve
A complete COB program changes both the timing and financial profile of overpayment prevention.
When pre-claim identifies other coverage before a claim arrives, overpayments are prevented across every future claim for that member, not just the one in front of you. Pre-pay then catches an estimated 70-80% of COB-related overpayments that reach adjudication. Those avoided costs don't require recovery and aren't subject to recovery risk. The remaining 20-30% continue through post-pay recovery, preserving downstream value.
When all three stages run together, cost structure stabilizes and is easier to forecast. Fewer post-payment corrections reduce rebilling and follow-up. Providers bill the correct primary payer on the first attempt, reducing back-end coordination. Payers avoid ingesting cases into accounts receivable workflows that go unrecovered.
Why this is achievable now
The model works because it is grounded in real data. Payers already have post-pay COB programs. History shows what was identified, what was recovered, and what was not recoverable. That data can be used to project pre-pay performance with specificity.
For example, a payer can evaluate the last 12 months of post-pay results and estimate how much of that volume could have been resolved before payment. That creates a clear, defensible business case.
Operational capabilities have also improved. Investigation workflows can now support same-day resolution for most primacy scenarios. Increased adoption of automated workflows has also improved processing speed. Faster processing cycles now make pre-payment coordination more operationally feasible.
Payers already have the building blocks. The complete program is what happens when they're connected.
What this means for payment integrity leaders
The strongest COB programs don't rely on a single stage. Pre-claim addresses coverage at the member level before claims arrive. Pre-pay resolves what pre-claim didn't catch before payment is released. Post-pay recovers what couldn't be resolved upstream. Each stage catches what the previous one missed.
For payment integrity leaders, the optimal coordination of benefits program considers the full lifecycle, integrating pre-claim, pre-pay, and post-pay efforts.
Want to uncover how much value you can capture earlier in your COB process? Contact our sales team to start a conversation today.
Gary Woodward, Sr. Vice President, Coordination of Benefits, leads Machinify’s Medical COB division and is responsible for overseeing all identification and recovery operations, including post-pay and pre-pay solutions. Gary joined the Company in 2004 and started in our Finance Department supporting the Subrogation, Pharmacy, and COB Audit divisions. Gary earned his B.S. in Business Management and Marketing from Indiana University.
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