How long does a health plan have to pay after losing a federal IDR dispute?

30 calendar days from the IDR entity's determination. The plan owes the difference between the arbiter's chosen amount and what it already paid on the claim. Separately, your IDR entity fee deposit is refunded to you as the prevailing party, typically within about 30 business days.

What can a provider do if the plan does not pay an IDR award?

Document the determination, the deadline date, and the shortfall, then file a complaint with CMS through the federal No Surprises Act complaint process (the No Surprises Help Desk at 1-800-985-3059 routes both patient and provider issues). Non-payment of IDR awards is an enforcement matter regulators actively collect complaints on. Persistent reconciliation matters because partial payments, offsets against unrelated claims, and mis-posted awards are more common than outright refusal.

Does winning an IDR dispute change what I can file next?

Yes, in two ways. The 90 calendar day cooling-off period bars new disputes by the initiating party against the same payer for the same or similar services, and claims caught in the window can be filed in the 30 business days after it ends. And the outcome itself is data: prior awards inform your next offers, and a payer that keeps losing a claim type at arbitration often becomes more willing to settle it in open negotiation, or to talk about a contract.

Answers / You won, now what

You won at IDR. Now what?

Three clocks start when the arbiter rules for you. The plan must pay the award, meaning the difference between the determined amount and what it already paid, within 30 calendar days of the decision. Your IDR entity fee deposit comes back as the prevailing party's refund, typically within about 30 business days. And the 90 calendar day cooling-off period begins, pausing new disputes against that payer for the same or similar services. Winning is not the end of the workflow. It is the start of a reconciliation problem most groups under-track.

The No Surprises Act's dispute process gets all the attention, but the post-award phase is where won money actually becomes received money, or quietly fails to. Here is what happens, in order, and where it goes wrong.

The payment, and how to check it

The determination sets the total out-of-network rate for the disputed items. The plan does not owe that number again in full; it owes the gap between the determination and its earlier initial payment, with the patient's cost sharing unchanged because that was fixed at in-network terms from the start. The check that arrives therefore never matches the headline award, which is exactly why award payments get mis-posted. Reconcile at the claim line: determination amount, minus initial payment, equals what should land, within 30 calendar days of the decision date. Track it the way you would track any receivable with a hard due date, because that is what it is.

Watch for two patterns in the remittance stream. Partial payments that round down against the determination, and offsets, where the award shows up entangled with recoupments on unrelated claims. Neither is necessarily sinister, and both routinely shortchange the provider until someone reconciles them line by line.

If the money does not come

Non-payment of a federal IDR award is not a negotiation, it is noncompliance with a binding determination. The sequence that works is boring and effective: document the determination, the 30 day deadline, and the shortfall; demand payment in writing with the dispute number attached; and file a complaint with CMS through the federal No Surprises Act complaint process. The No Surprises Help Desk at 1-800-985-3059 routes provider complaints as well as patient ones. Regulators actively collect these complaints, and a documented pattern of unpaid awards against a payer is exactly the kind of record that gets attention. Keep your own ledger of award-to-payment lag by payer. It tells you who pays on day 29 and who needs the letter, and it is evidence if it comes to that.

The cooling-off period, and the next batch

After the determination, the initiating party waits 90 calendar days before filing against the same payer for the same or similar items and services. New claims do not stop accruing during that window, and the rules preserve them: claims whose filing windows fall inside the cooling-off period can be initiated in the 30 business days after it ends. Operationally this means your filing calendar per payer and code family breathes in 90 day cycles, and batches on the far side of a cooling-off window arrive bigger. The timeline guide covers how this interlocks with the other deadlines, and the batching guide covers what to do with the accumulated claims.

The last thing a win produces is information. Awards by payer and code feed your next offers, and payers respond to their own loss record: a plan that keeps losing a claim type at 4.7 times QPA has a growing reason to settle in open negotiation or to offer a contract worth signing. Groups that treat each dispute as an isolated event never collect that compounding return. The public record at idrexplorer.com shows the market-wide version; your own ledger shows yours.

Filing already, but the back end leaks?

The free NSA audit includes your public filing record and where it diverges from the market. Or get a flat fee quote: tracking awards to payment is part of the service.