The No Surprises Act changed out-of-network billing permanently. Three years after implementation, many providers still do not fully understand how the law affects their reimbursement, what the IDR process actually involves, or how to use the new framework to their advantage. This guide covers everything providers need to know about the NSA in 2025 — from the basic rules to advanced strategies for maximizing OON revenue under the current regulatory environment.
What Is the No Surprises Act?
The No Surprises Act is a federal law enacted as part of the Consolidated Appropriations Act of 2021 and effective January 1, 2022. Its primary purpose is to protect patients from unexpected medical bills when they receive care from out-of-network providers in situations where they had no meaningful choice. The law was a response to the widespread problem of surprise billing, where patients received large balance bills after emergency visits or procedures at in-network facilities where an OON provider was involved.
Before the NSA, patients could be billed the difference between what their insurance paid and what the OON provider charged — sometimes tens of thousands of dollars for a single encounter. The NSA eliminates this by holding patients harmless and creating a new framework for how providers and payers resolve OON payment disputes between themselves.
For providers, the NSA is not simply a billing restriction. It is a new reimbursement system with its own rules, timelines, and dispute resolution mechanisms. Understanding these mechanisms is essential for any practice that provides OON services.
How NSA Affects Out-of-Network Providers
The NSA applies to three categories of services. First, all emergency services regardless of network status — the patient's cost-sharing is based on in-network rates, and the provider cannot balance bill. Second, non-emergency services provided by OON providers at in-network facilities, such as an OON anesthesiologist working at an in-network hospital. Third, air ambulance services provided by OON operators.
For non-emergency services at in-network facilities, the law includes a notice and consent exception. If the provider gives the patient written notice at least 72 hours before the service (or 3 hours in some urgent cases), and the patient signs a consent form acknowledging they are choosing an OON provider, the balance billing prohibition does not apply. This exception is critical for specialties like anesthesiology and pathology to understand and implement where appropriate.
The most significant impact of the NSA is on the provider-payer relationship. With balance billing eliminated for covered services, the provider's only recourse when the payer offers an inadequate rate is the OON billing negotiation and IDR process. This makes the quality of your post-payment recovery operation more important than it has ever been.
The Qualifying Payment Amount (QPA)
The Qualifying Payment Amount is a central concept in the NSA framework. The QPA is defined as the median of the contracted rates recognized by the health plan for the same or similar item or service in the same geographic region. In simpler terms, it is the payer's median in-network rate for the procedure in question. The QPA determines the patient's cost-sharing obligation and serves as a reference point in the IDR process.
There are important nuances to how the QPA is calculated. Payers must use contracted rates from the same insurance market (individual, small group, large group, self-funded), the same geographic region, and the same or similar service code. The QPA is updated annually and indexed for inflation. Payers are required to disclose the QPA on the initial payment or denial notice.
Why does the QPA matter for providers? Because payers often set their initial OON payment at or near the QPA, arguing it represents fair market value. However, the QPA is derived from the payer's own contracted rates, which may significantly undervalue the service — especially for specialties where in-network rates are depressed by market dynamics. The IDR process exists precisely because the QPA alone is not meant to be the final word on fair payment.
The Independent Dispute Resolution (IDR) Process
When a provider and payer cannot agree on payment for an OON claim covered by the NSA, either party can initiate Independent Dispute Resolution. IDR is a binding arbitration process where a certified third-party entity selects between the provider's and the payer's proposed payment amounts. The arbiter does not split the difference — they must choose one offer or the other, which encourages both sides to submit reasonable proposals.
When IDR Applies
IDR applies to claims for emergency services, non-emergency services by OON providers at in-network facilities (where no valid notice and consent was obtained), and OON air ambulance services. Before initiating IDR, there is a mandatory 30-business-day open negotiation period during which the provider and payer attempt to reach agreement. If negotiation fails, either party has four business days to initiate IDR.
How to File an IDR Case
Filing an IDR case requires submitting a dispute through the federal IDR portal maintained by the Centers for Medicare and Medicaid Services. The initiating party selects a certified IDR entity from the approved list, and the opposing party can object and propose an alternative. Each side submits a final offer along with supporting documentation within the prescribed timeline. The entire process from initiation to decision typically takes 30 to 45 days.
There is an administrative fee for IDR, currently $50 per party per dispute for batched claims. The losing party bears the cost of the IDR entity's fee, which ranges from $200 to $700 per case depending on complexity. These costs are manageable when the payment differential justifies the dispute, but they make IDR impractical for low-dollar claims unless they can be batched.
What the Arbiter Considers
The IDR entity must begin by considering the QPA, but the law specifies additional factors that can justify a payment above the QPA. These include the provider's level of training, experience, and quality metrics; the market share of the provider or payer in the relevant geographic area; the acuity of the patient and complexity of the service; the teaching status of the facility; and prior contracted rates between the parties. Demonstrations of good faith in prior negotiations are also considered.
This is where preparation matters. Providers who submit IDR cases with comprehensive supporting data — UCR benchmarking, Fair Health percentile rankings, clinical documentation demonstrating complexity, and evidence of the payer's market dominance — win at significantly higher rates than those who submit a number without context.
Winning IDR — What the Data Shows
Published data from the federal IDR portal shows that providers who submit well-documented cases with credible benchmarking data win a majority of disputes. Early data indicated that providers won approximately 70 to 80 percent of IDR cases in certain specialties, though outcomes vary by payer, geography, and the quality of the submission. The key finding is that IDR works when providers invest in the preparation process.
However, many providers have been discouraged by the volume of IDR cases, administrative complexity, and evolving regulatory guidance. CMS has issued multiple rounds of updated rules clarifying the role of the QPA and the weight given to additional factors. Staying current with these regulatory changes is essential for anyone filing IDR cases.
Strategies for Maximizing Reimbursement Under NSA
The No Surprises Act does not prevent providers from being paid fairly. It changes the mechanism through which fair payment is achieved. Here are the strategies that high-performing practices use to maximize OON reimbursement in the NSA environment.
- UCR benchmarking on every OON claim: Use Fair Health and comparable databases to establish the 70th to 80th percentile UCR rate for every procedure. This becomes your baseline for negotiation and IDR.
- Detailed clinical documentation: Claims that demonstrate patient acuity, procedural complexity, and provider expertise are harder for payers to underpay. Document everything that supports a higher rate.
- Active open negotiation: Use the 30-day negotiation window strategically. Present your UCR data, prior contracted rates, and Fair Health percentiles. Many claims settle during negotiation without going to IDR.
- Selective IDR filing: Not every claim justifies IDR. Focus on high-dollar claims and batches where the payment differential is large enough to justify the time and administrative cost.
- Track payer patterns: Build a database of payer-specific QPA disclosures, initial offers, and IDR outcomes. Use this data to identify which payers consistently underpay and which respond to negotiation pressure.
The practices that recover the most under the NSA are those with a systematic, data-driven process — not those that treat each claim as a one-off event.
How REL1EF Handles NSA Compliance
REL1EF operates a dedicated NSA compliance and OON recovery layer built specifically for the post-NSA environment. Every OON claim is benchmarked against UCR data, tracked through the open negotiation period, and escalated to IDR when the payer's offer does not reflect fair value. The process is managed by specialists who work exclusively on out-of-network billing and IDR cases.
REL1EF's non-contracted solutions team handles the full lifecycle: initial claim submission, payer negotiation, IDR case preparation and filing, and payment collection. The model is no-win, no-fee, meaning REL1EF only earns when the practice collects additional revenue. There is no upfront cost and no risk to the provider.
For practices that want to evaluate the process before committing, REL1EF offers a free A/R recovery trial. We work your existing aged OON receivables at no upfront cost, and you see the results before making any long-term decision. The money is already owed — it just needs a process built to collect it.