How to Fight Out-of-Network and Surprise Medical Bill Denials: A Patient's Guide to No Surprises Act Appeals

You went to the emergency room during a heart attack, or your surgeon chose an assistant you never met, or an air ambulance landed and saved your life—and now you're facing a five-figure bill because someone in the chain was "out of network." For decades, patients were caught in the middle, but since January 2022, federal law has changed the game. The No Surprises Act (NSA) prohibits most surprise medical bills and requires insurers to cover emergency and certain out-of-network care at in-network rates. Yet insurers still routinely deny or underpay these claims, either because they don't recognize an emergency, because they miscalculate cost-sharing, or because they hope you won't appeal. This guide walks you through why out-of-network denials happen, which legal protections apply, and how to write an appeal that cites the statutes insurers must follow.

---

Why Insurers Deny Out-of-Network Claims

Even under the No Surprises Act, insurers deploy a handful of templates to limit what they pay on out-of-network claims:

1. "The condition was not an emergency under the prudent-layperson standard."

The insurer argues that your chest pain was indigestion, your severe headache was a migraine, or your child's high fever didn't justify an ER visit—so the claim gets processed as a non-emergency out-of-network visit with steep cost-sharing or no coverage.

2. "You could have transferred to an in-network facility after stabilization."

After the ER stabilized you, the plan contends you should have been transferred to a network hospital for further treatment, and it refuses to pay in-network rates for the post-stabilization care that occurred out-of-network.

3. "The provider is out of network; we paid the allowed amount based on usual-and-customary."

The insurer pays a fraction of the bill—often far below the qualified payment amount (QPA) required by the NSA—and leaves you with a balance bill, claiming it has met its obligation.

4. "You signed a consent form agreeing to out-of-network charges."

The plan points to a document you signed at hospital registration or before surgery, asserting you waived your No Surprises Act protections.

5. "This service is not covered by the No Surprises Act."

Common for ground ambulances (which the NSA explicitly excludes) or for services the insurer argues fall outside the statute's definitions—such as continuity-of-care situations or network-adequacy gaps.

---

The Citations Insurers Respect

Federal and state laws create a web of protections. When you appeal, name the specific statute, regulation, or agency guidance. Vague references to "the law" won't work; precise citations force the insurer's attorneys to review the actual text. Here are the key authorities:

Federal No Surprises Act (NSA)

• Public Law 116-260, Division BB, Title I (Consolidated Appropriations Act, 2021), effective for plan years beginning January 1, 2022
• Codified at 42 U.S.C. §300gg-111 (emergency services), §300gg-131 to -134 (balance-billing prohibitions), §300gg-135 (air ambulance)
• Implementing regulations: 45 CFR Part 149 (especially §149.110 for emergency services; §149.140 for QPA methodology)
• Cost-sharing rule: 45 CFR §149.110(c)—in-network cost-sharing calculated using the lesser of the QPA or billed charge
• QPA disclosure: 45 CFR §149.140(d)—insurers must disclose QPA, methodology, and downcode explanations on request

ERISA (for employer plans)

• 29 U.S.C. §1132(a)(1)(B) (right to sue for benefits)
• 29 U.S.C. §1133 (claims-procedure requirements, full-and-fair review)
• 29 CFR §2560.503-1 (DOL claims regulation requiring specific denial reasons and appeal rights)

Prudent-Layperson Standard

• Defined in 42 U.S.C. §300gg-111(a)(3)(C)(i): an emergency is any condition that a prudent layperson, possessing average knowledge of health and medicine, would reasonably believe could result in serious jeopardy to health, serious dysfunction, or serious bodily harm without immediate medical attention
• Also appears in many state insurance codes and Medicaid statutes

State Surprise-Billing Laws

• Many states enacted their own protections before the federal NSA; the NSA generally preempts state law for self-funded ERISA plans but does not preempt state balance-billing prohibitions for fully-insured plans (and state laws often offer more protections, e.g., ground ambulances in some states)
• Examples: California AB 72 (2016), New York Financial Services Law §606, Texas Insurance Code Chapter 1467, Florida §627.64194

Network-Adequacy Standards

• 45 CFR §156.230 (QHP network adequacy for Marketplace plans)
• State insurance codes typically require "reasonable access" to in-network specialists within time/distance standards
• ERISA §503: if no in-network provider is available for a medically necessary service, the plan must authorize out-of-network care at in-network cost-sharing

---

How to Argue Against Each Denial Template

1. "The condition was not an emergency under the prudent-layperson standard"

Your counter-argument:

The No Surprises Act and the Affordable Care Act both define "emergency services" using the prudent-layperson standard (42 U.S.C. §300gg-111(a)(3)(C)(i)). The test is not what the final diagnosis turned out to be; it is what a reasonable person would have believed at the time symptoms began.

Concrete steps:

1. Gather contemporaneous evidence: text messages, photos, witness statements, 911 call records, triage notes showing vital signs (high fever, tachycardia, hypotension, hypoxia).

2. List the presenting symptoms in your appeal: chest pain radiating to the arm, sudden severe headache with vision changes, difficulty breathing, uncontrolled bleeding, loss of consciousness, severe abdominal pain.

3. Cite the statute verbatim: "Under 42 U.S.C. §300gg-111(a)(3)(C)(i) and 45 CFR §149.110(a)(2), 'emergency medical condition' is defined by the prudent-layperson standard. My symptoms—[list them]—would lead any reasonable person with average knowledge of health to believe immediate care was necessary to prevent serious jeopardy, dysfunction, or harm."

4. Invoke the prohibition on retroactive denial: "45 CFR §149.110(b) prohibits plans from denying emergency claims based on final diagnosis. The plan may not second-guess the prudent layperson's decision after the fact."

5. If your state has its own prudent-layperson law, cite it: For example, California Health and Safety Code §1317.1, New York Insurance Law §3224-a.

6. Demand in-network cost-sharing: "Because this was emergency services under federal and [state] law, 42 U.S.C. §300gg-111(a)(1)(C) and 45 CFR §149.110(c) require that my cost-sharing be calculated as if the services were furnished by an in-network provider, without prior authorization."

Pro tip: Many insurers use retrospective nurse review to downgrade claims. Attach the American College of Emergency Physicians (ACEP) policy statement opposing retrospective denials and emphasizing the prudent-layperson standard (widely accepted by regulators).

---

2. "You could have transferred to an in-network facility after stabilization"

Your counter-argument:

The No Surprises Act requires insurers to cover post-stabilization services at out-of-network facilities unless the plan satisfies a strict notice-and-consent process or arranges a safe transfer.

Concrete steps:

1. Understand the three buckets:

- Screening and stabilization are always covered as emergency services, in or out of network.

- Post-stabilization (care after you're stable enough that you won't deteriorate if moved) is also covered unless the plan (a) arranges a safe transfer to in-network or (b) obtains valid informed consent.

2. Check the regulation: 45 CFR §149.110(c)(2)(ii) says post-stabilization services are emergency services if the out-of-network provider or facility satisfies the notice-and-consent criteria or if no such notice was given and no transfer arranged.

3. In your appeal, ask:

- "Did the plan contact the treating physician and offer to arrange a safe transfer to an in-network facility, and did the physician agree the transfer was medically appropriate?"

- "Did I receive a standalone CMS Standard Notice and Consent form (OMB control number 0938-1401) in my preferred language, at least 72 hours before the post-stabilization service, with a good-faith estimate of charges?"

4. Cite the law: "Under 45 CFR §149.110(c)(2)(ii), post-stabilization services at an out-of-network facility must be covered as emergency services unless the plan arranges a safe transfer or obtains valid written consent under 45 CFR §149.410. No such notice or transfer was provided. Therefore, the plan must apply in-network cost-sharing for all services through discharge."

5. Burden of proof: Note that the plan—not you—bears the burden of proving that a safe transfer was offered and declined, or that valid consent was obtained. If the plan cannot produce documentation, the claim must be paid at in-network rates.

---

3. "The provider is out of network; we paid the allowed amount based on usual-and-customary"

Your counter-argument:

For NSA-protected services, the insurer may not use its usual out-of-network "reasonable-and-customary" formula. Instead, it must calculate cost-sharing using the qualified payment amount (QPA) and apply that cost-sharing to your in-network deductible and out-of-pocket maximum.

Concrete steps:

1. Identify whether your situation is NSA-protected:

- Emergency services (any facility, in or out of network)

- Non-emergency services by an out-of-network provider at an in-network facility (for example, anesthesiology, radiology, pathology, neonatology, assistant surgeon, hospitalist at a network hospital)

- Air ambulance services

2. Request the QPA in writing: Under 45 CFR §149.140(d), within 30 business days of your request, the plan must disclose the QPA, the methodology used to calculate it, and any service codes that were downcoded.

3. Compare payment to QPA: If the plan paid less than the QPA, or if your cost-sharing was based on a non-QPA amount, cite 45 CFR §149.110(c)(1): "Cost sharing … shall be calculated as if the total amount that would have been charged for such services by such provider or facility is equal to the lesser of the amount billed or the qualifying payment amount."

4. Cite the balance-billing ban: "Under 42 U.S.C. §300gg-131, the provider is prohibited from balance billing me for any amount above in-network cost-sharing. The plan's underpayment forces me into a balance-bill situation that federal law prohibits. The plan must pay the provider the QPA (or enter independent dispute resolution) and limit my responsibility to in-network cost-sharing."

5. If ground ambulance (not covered by NSA): Pivot to state law. Many states (e.g., Colorado, Delaware, West Virginia) cap patient liability for ground-ambulance surprise bills. Cite your state's law and request that the plan honor it (fully insured plans) or voluntarily apply the same standard (self-funded ERISA plans as a matter of equity and member protection).

---

4. "You signed a consent form agreeing to out-of-network charges"

Your counter-argument:

The No Surprises Act permits consent waivers only in very narrow circumstances, and the consent must be on a CMS-approved standalone form. Bundled admission paperwork, blanket financial-responsibility forms, and verbal consents are not valid.

Concrete steps:

1. Review what you actually signed: Was it the multi-page hospital admission packet? A single-page "I am responsible for all charges" form? Or a document titled "Standard Notice and Consent to Be Treated by an Out-of-Network Provider" with OMB control number 0938-1401?

2. Know when consent is allowed: 45 CFR §149.410 permits notice-and-consent waivers only for:

- Non-emergency services at an in-network facility (scheduled/elective)

- Post-stabilization services if certain conditions are met

Consent is never allowed for emergency services, ancillary services (anesthesia, radiology, pathology, lab, neonatology) at in-network facilities, or air ambulance.

3. Check timing and language: The CMS notice must be provided at least 72 hours before the service (or at least 3 hours for post-stabilization if earlier notice is not practicable), in your preferred language, and include a good-faith cost estimate.

4. In your appeal: "I did not sign a valid CMS Standard Notice and Consent form as required by 45 CFR §149.410. The document I signed was [describe: e.g., a general financial-responsibility form bundled with admission paperwork, not a standalone NSA consent]. Under the regulation, blanket consent forms do not satisfy the NSA waiver requirements. Therefore, the service is protected by the balance-billing prohibition, and the plan must apply in-network cost-sharing."

5. Cite the prohibition on ancillary waivers: If the service was anesthesia, radiology, pathology, or assistant-surgeon services at an in-network hospital, add: "45 CFR §149.410(c) explicitly prohibits notice-and-consent for ancillary services. No valid waiver is possible."

---

5. "This service is not covered by the No Surprises Act"

This template appears in two main scenarios: (a) ground ambulances, which the NSA excludes, and (b) network-adequacy or continuity-of-care situations.

#### 5a. Ground Ambulance

Your counter-argument:

Acknowledge the NSA gap—42 U.S.C. §300gg-135 covers air ambulance but is silent on ground ambulance—and pivot to state law and plan documents.

Concrete steps:

1. Check your state: Some states cap patient liability for ground-ambulance surprise bills (e.g., Colorado limits patient cost to in-network cost-sharing for 911 calls; Delaware and West Virginia have similar protections).

2. If fully insured plan: Cite your state law and demand compliance.

3. If self-funded ERISA plan: State insurance laws are preempted, but you can still argue:

- Plan-document coverage: Many SPDs say emergency ambulance is covered. If your plan does not exclude ground ambulance from the emergency-services definition, argue the plan must pay.

- ERISA fair-claims process (29 CFR §2560.503-1): If the plan summarily denied the claim without considering whether the ambulance was medically necessary and whether you had any reasonable alternative, request a full-and-fair review.

- Equity and policy: Note that CMS and Congress have acknowledged the ground-ambulance surprise-billing problem and that many commercial plans have begun voluntarily applying NSA principles to ground ambulance. Request the same treatment.

4. Appeal the amount paid: Even if the insurer won't treat it as NSA-protected, challenge any "reasonable-and-customary" floor that is far below Medicare rates or regional averages. Cite the ambulance company's cost data if available.

#### 5b. Network Adequacy / Continuity of Care

Your counter-argument:

When no in-network provider is available (or your longtime provider left the network mid-treatment), the plan must authorize out-of-network care at in-network cost-sharing under network-adequacy and continuity-of-care obligations.

Concrete steps:

1. Network adequacy (no specialist available):

- Cite 45 CFR §156.230 (for QHPs) or your state's network-adequacy standard (time/distance requirements).

- Document your search: call logs, provider directory screenshots, letters from specialists declining new patients.

- In your appeal: "The plan's network has no in-network [specialist] within [X miles / X weeks wait time]. Under 45 CFR §156.230(a)(2) and [state regulation], the plan must provide access to covered services. Because in-network access is not available, the plan must authorize out-of-network care at in-network cost-sharing. See also 29 CFR §2560.503-1 (ERISA's full-and-fair-review requirement)."

2. Continuity of care (provider left network or plan changed):

- Many states require 60–90 days of transitional coverage when a provider terminates or the plan changes mid-year.

- Cite your state's continuity-of-care law (e.g., California Health and Safety Code §1373.96) or the plan's own SPD language about "transition of care."

- For ERISA plans without state-law protection, argue breach of fiduciary duty if the plan changed networks mid-year without adequate notice and transitional coverage, especially for ongoing treatment (cancer, pregnancy, surgery series).

3. In both scenarios, demand a gap exception: "I request an out-of-network gap exception authorizing Dr. [Name] to provide [service] at in-network cost-sharing, because no in-network alternative exists to meet my medical needs."

---

What We Do

We are a specialized appeals firm that helps patients and advocates fight out-of-network and surprise-billing denials. We draft appeals that cite the No Surprises Act, ERISA, state balance-billing laws, and network-adequacy standards—precisely and forcefully. Our process is fast (most letters ready in under 10 minutes), our language is clear, and our citations are real. We don't make vague legal claims; we quote chapter and verse from 45 CFR Part 149, the Consolidated Appropriations Act, and the regulations insurers' own attorneys must follow. If you're facing a five- or six-figure surprise bill, or if your insurer denied an emergency claim because you didn't call for pre-authorization during a heart attack, we can help you write the appeal that forces a second look.

---

Sources

1. Consolidated Appropriations Act, 2021, Pub. L. No. 116-260, div. BB (No Surprises Act provisions), enacted December 27, 2020.

2. 42 U.S.C. §300gg-111 (Emergency services, prudent-layperson standard).

3. 42 U.S.C. §300gg-131 to §300gg-135 (Balance billing prohibitions and air ambulance).

4. 45 CFR Part 149 (HHS implementing regulations for the No Surprises Act), effective January 1, 2022.

5. 45 CFR §149.110 (Emergency services and post-stabilization services cost-sharing).

6. 45 CFR §149.140 (Qualified payment amount (QPA) methodology and disclosure requirements).

7. 45 CFR §149.410 (Notice and consent requirements and limitations).

8. 29 U.S.C. §1132(a)(1)(B) and §1133 (ERISA claims and appeals rights).

9. 29 CFR §2560.503-1 (DOL claims-procedure regulation).

10. 45 CFR §156.230 (Network adequacy standards for qualified health plans).

11. Centers for Medicare & Medicaid Services (CMS), "Requirements Related to Surprise Billing; Part I" (Interim Final Rule, July 2021) and "Part II" (October 2021).

12. CMS, "Federal Independent Dispute Resolution Process: Open Negotiations and Payment Determinations," reports and data, 2022–2024, available at cms.gov/nosurprises.

13. American College of Emergency Physicians (ACEP), "Prudent Layperson Standard" policy statement, reaffirmed 2021.

14. State surprise-billing statutes (examples): California AB 72 (2016, Health and Safety Code §1371.4, §1371.30); New York Financial Services Law §606; Texas Insurance Code Chapter 1467; Florida Statutes §627.64194.

15. Congressional Research Service, "The No Surprises Act: Implementation and Issues" (R46971), updated 2023.

---

Disclaimer: This guide is for educational purposes and does not constitute legal or medical advice. Insurance law varies by state and plan type. For complex cases, consider consulting an attorney experienced in ERISA or health-insurance law, or filing a complaint with your state department of insurance or the U.S. Department of Labor.