Emergency Room Visit Denied by Insurance? Here's What to Do

Receiving a bill for a denied emergency room visit is alarming — you went to the ER because you genuinely feared for your health, and now your insurer is second-guessing that decision from behind a desk. This is one of the most commonly litigated areas of insurance coverage, and the law has progressively strengthened patient protections. Here is what you need to know.

The Prudent Layperson Standard

The cornerstone of emergency care coverage law is the prudent layperson standard. This legal doctrine states that coverage for emergency services must be determined based on the presenting symptoms — not the final diagnosis.

Under this standard, your insurer must cover your ER visit if a reasonable person with average medical knowledge, experiencing the same symptoms, would have believed they were facing an emergency medical condition. The fact that your discharge diagnosis turned out to be non-life-threatening does not retroactively eliminate coverage.

Federal law under the ACA, as well as most state laws, incorporates the prudent layperson standard. Medicare Advantage plans are also subject to this standard. Despite these legal protections, some insurers — most notably certain large commercial plans — have attempted to deny ER visits based on final diagnosis, a practice that has drawn widespread state regulatory action and class-action litigation.

Common Reasons Insurers Deny ER Visits

• Non-emergency final diagnosis: Insurer argues the condition could have been treated in an urgent care or primary care setting.
• Out-of-network ER: You were treated at a facility outside your plan network, particularly relevant for HMO members.
• Lack of Prior Authorization Denied: How to Appeal" class="auto-link">prior authorization: Some plans attempt to require prior authorization for ER visits, which is generally prohibited by law but may still appear on denial letters.
• Out-of-area coverage disputes: Particularly for plans that restrict coverage to a geographic service area.
• Separate billing of emergency physician groups: The treating ER physician may bill separately from the facility, creating a separate claim that requires its own review.

Post-Stabilization Coverage

Federal regulations under EMTALA and the ACA require insurers to cover post-stabilization care provided in an out-of-network emergency setting without prior authorization, as long as a treating physician certifies that transfer would be medically risky and you have not been discharged from the emergency setting.

If your insurer denied charges related to care provided after initial stabilization but before you could be safely discharged or transferred, that denial is legally suspect and should be appealed on post-stabilization grounds.

The No Surprises Act (NSA)

The No Surprises Act, which took effect January 1, 2022, fundamentally changed out-of-network billing in emergency settings. Key protections include:

• Balance billing prohibition: Out-of-network providers cannot bill you more than your in-network cost-sharing for emergency services at hospital-based ERs.
• Independent Dispute Resolution (IDR): Insurers and providers must resolve payment disputes through a federal arbitration process. You are not responsible for the difference.
• Disclosure requirements: Hospitals and providers must notify patients of their NSA rights.

If you received a surprise bill for an out-of-network ER visit after January 1, 2022, you may be protected by the NSA. Contact your insurer to invoke your protections and file a complaint with the No Surprises Help Desk (1-800-985-3059) if violations occur.

How to Appeal an ER Denial

Step 1: Document your symptoms at the time of arrival. Triage notes, nursing assessments, and the emergency physician's initial evaluation all describe your presenting condition — not the eventual diagnosis. These records are your primary appeal evidence.

Step 2: Reference the prudent layperson standard explicitly. Your appeal letter should cite federal and state law and argue that your presenting symptoms — chest pain, difficulty breathing, severe abdominal pain, altered consciousness — would cause any reasonable person to seek emergency care.

Step 3: Request the insurer's clinical criteria. Ask which specific criteria were used to determine the denial and which criteria your claim failed to meet.

Step 4: Submit your physician's statement. The treating emergency physician can provide a statement confirming that your condition required emergency evaluation and that delay in care would have posed risk.

Step 5: File with your state insurance department. State regulators take ER denial complaints seriously, especially where prudent layperson violations are alleged.

Step 6: File an external appeal. If your internal appeal is denied, request an independent External Independent Review: Complete Guide" class="auto-link">external review. External reviewers are bound by prudent layperson standards, not just the insurer's internal criteria.

Fight Back With ClaimBack

An ER denial does not have to be the last word. ClaimBack helps you build an appeal grounded in the legal protections you're entitled to under federal and state law.

Start your appeal with ClaimBack

Related Reading

• Common Reasons Insurance Claims Are Denied
• Internal vs. External Insurance Appeal: Which to File
• How to Write an Insurance Appeal Letter