The Stop-Loss Blind Spot: Who's Checking the Check?
By Nick Allen, FSA, MAAA, FCA
Self-funded employers rely on stop-loss insurance to pay them back for large claims. But the carrier decides how much it owes and when it pays, and few employers check. Errors in filing, contract terms, lasers and aggregate math can shift six figures. Here's where reimbursements go wrong, and three questions to ask your clients.
The safety net nobody checks
Self-funded employers pay every claim up front. The TPA (third-party administrator) pulls money from the claims account, often every week. When a big claim hits, stop-loss insurance is supposed to pay the employer back.
But the carrier decides how much it owes, and when it pays. The employer just waits for the check.
Think about any other vendor working that way. No controller would accept it. Yet it's how most self-funded plans run today.
The TPA side has its share of mistakes too, like duplicate payments or claims paid for people no longer on the plan. But the biggest headaches usually sit with stop-loss. This isn't about bad intent. Carriers handle huge volumes, and mistakes happen. The question is whether anyone will catch them.
Where do stop-loss reimbursements go wrong?
Stop-loss contracts are dense. Few people at the employer have read theirs closely. Most only learn how a claim turned out when a check arrives, or doesn't. Here's where things slip:
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Claims filed late, or never. A big claim crosses the deductible, but the filing waits on the TPA. Or it never happens because of human communication error.
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The wrong contract terms. Terms like 12/15, 24/12 or paid basis decide which claims count. Get them wrong and six figures can shift from one year to the next. (See the glossary below.)
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Lasers. A laser gets applied to the wrong person or the wrong amount, or carried into a renewal it shouldn't be in.
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Denials. The carrier refuses part of a claim the plan paid correctly. The explanation is thin, and there is little pushback.
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Aggregate math. The aggregate attachment point is built on monthly enrollment. If enrollment counts are off, so is the settlement.
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Slow money. Even correct payments can take months. Meanwhile, the employer has already paid the full claim.
The carrier decides what it owes. Unless someone checks, everyone takes that number on faith.
And when the number looks wrong, the question usually lands on your desk. The carrier's answer is vague. The TPA points back at the stop-loss carrier. You're stuck in the middle, trying to make sense of a tricky contract, for a client who wants an answer today.
Why are finance teams asking about stop-loss?
HR owns the benefits plan, but finance is responsible for taking care of the money. Controllers, accountants and CFOs approve weekly claim drafts they can't check. They book stop-loss money owed based on what the carrier tells them. And they're the ones answering the auditors.
Finance teams expect numbers that match and records that show the work. In health plans, the controls to support those responsibilities are often missing. Most finance leaders know it but haven't had a practical way to fix it, because the work requires deep knowledge of claims and stop-loss.
For brokers, this is where it gets frustrating. Finance talks in reconciliations, accruals and audit trails. Benefits talks in deductibles, lasers and run-out. You end up translating between the two, often without the data to answer what finance is really asking. It's not the conversation you signed up for, but it's the one that decides whether the client trusts you.
What should brokers ask self-funded clients about stop-loss?
You don't need to redo the carrier's or the TPA's work. You need someone checking the money on a regular basis. Start with these three questions:
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Is anyone tracking large claims against the stop-loss deductible? Filings should be expected, not a surprise.
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Is each stop-loss payment checked against the contract? Contract terms, lasers, run-in, run-out and aggregate math should all be verified.
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Do the year-end estimates come from someone independent? IBNR and stop-loss money owed should be estimated by someone other than the TPA or carrier.
If the answer is "no" or "I'm not sure," there may be money left on the table. And it's a gap the auditors may find before anyone else does.
How Blue Raven helps. You don't need to become a stop-loss expert or an accountant. That's our job. Blue Raven Actuarial works with brokers to give self-funded employers an independent check on their stop-loss. Our actuaries and financial consultants track large claims against the contract, check each reimbursement, and produce IBNR estimates finance teams can take to their auditors. When needed, we also tie TPA funding back to claim detail. We support your relationship with the client's finance team.
If any of your clients would struggle with the three questions above, or you've had a stop-loss conversation that left you more confused than when it started, let's talk. We'll walk through what an independent review could look like for one of your groups.
Frequently asked questions
Who is responsible for checking stop-loss reimbursements?
In most self-funded plans, no one is assigned to it. The carrier calculates what it owes and the employer accepts the check. An independent reviewer, such as an actuary or financial consultant, can track large claims and verify each payment against the contract.
What are the most common stop-loss reimbursement errors?
Late or missed filings, misapplied contract terms (like 12/15 or 24/12), incorrect lasers, thinly explained denials, and aggregate settlements built on wrong enrollment counts.
How long do stop-loss reimbursements take?
Even correct payments can take months. The employer has already paid the full claim in the meantime, which puts pressure on cash flow.
Who should estimate IBNR for a self-funded plan?
Someone independent of the TPA and the stop-loss carrier. Finance teams and auditors need year-end estimates of IBNR and stop-loss money owed that don't come from the parties paying or processing the claims.