How the federal IDR process works.Open negotiation to determination, step by step.

Federal IDR is final offer arbitration. Each side submits a single payment amount for the disputed service, and a certified independent dispute resolution entity, the IDRE, picks one of the two offers. The arbitrator cannot split the difference or invent a third number. It selects the offer better supported by the evidence.

That structure is sometimes called baseball style arbitration, because each side commits to one number and the arbitrator chooses between them. It rewards the party that submits a credible, well documented offer and penalizes a number that looks arbitrary.

IDR applies to qualifying out of network claims governed by the No Surprises Act. It does not apply to Medicare, Medicaid, or claims a state arbitration law already covers. Confirming the claim qualifies is the first thing your team should settle before investing time in a submission.

Before any claim can reach arbitration, the No Surprises Act requires a 30 business day open negotiation period. Either party can start it by sending an Open Negotiation Notice on the federal standard notice form within 30 business days of receiving the initial payment or the denial.

The 30 business day window is a real negotiation opportunity. Many disputes settle here once a plan sees that the provider intends to pursue arbitration. If the period ends without agreement, the open negotiation step is complete and the claim becomes eligible to move forward.

Keep proof that the notice was sent and the date it was sent. The IDRE will expect documentation that open negotiation happened and that the 30 business day period elapsed.

Once open negotiation closes without a deal, the initiating party has four business days to start IDR. You file through the federal IDR portal hosted by CMS, the same portal both parties and the arbitrators use to manage a dispute.

Initiation identifies the claim, the service, the parties, and the qualified payment amount the plan reported. It also proposes a certified IDRE. The portal is where every later step lives, so your billing team should have portal access set up before the first filing, not during it.

After initiation, the two parties have three business days to jointly agree on a certified independent dispute resolution entity. If they cannot agree, CMS assigns one from the list of certified entities.

The IDRE must be free of conflicts with either party. Once selected and conflict cleared, the arbitrator sets the schedule for offers and evidence.

Both parties submit their offer and their supporting documentation within 10 business days of selecting the IDRE. This is the heart of the dispute and where most of the work lives.

A strong submission pairs a specific payment offer with evidence the arbitrator can act on: market rate justification grounded in prior determinations for the same service and geography, clinical necessity tied to the operative note, and the provider's credentials and procedure volume on the specific code.

The IDRE issues a written determination, typically within 30 business days of being selected. It picks one offer and explains the basis. The losing party generally bears the IDRE fee, which raises the stakes on submitting a credible number.

When the provider's offer prevails, the plan must pay the difference between what it already paid and the determined amount, generally within 30 calendar days of the determination. If the plan does not pay on time, the determination is enforceable and the provider has recourse.

Sydra prepares the submission your team files. It identifies the correct code from the explanation of benefits, drafts the market rate justification from a library of prior determinations, builds the clinical narrative from the operative note, and assembles the credential block. Your billing team reviews, approves, and submits through the federal portal.

The process above does not change. The time it takes does. Building a complete submission from scratch runs 25 to 40 minutes per claim. With Sydra, the same packet comes together in under five minutes, and your team stays in control of every submission.