BillSherpa · Patient Advocacy · Updated 2026

Got a surprise $10,000 ER bill? Here's what patients don't know

You didn't choose the hospital. You were in an emergency. You went to the closest ER or were taken by ambulance. Now you have a bill for thousands of dollars — and you're wondering if this can possibly be right. In many cases, it isn't.

What the No Surprises Act means for your ER bill

The No Surprises Act 42 U.S.C. § 300gg-111, which took full effect in 2022, fundamentally changed what hospitals can charge you for emergency care. Here's what it covers:

• Emergency care at any hospital — even if the hospital is out of your insurance network, you can only be charged your in-network cost-sharing amount (your deductible, copay, or coinsurance as defined by your plan).
• Out-of-network providers at in-network facilities — if you were admitted to an in-network hospital but an out-of-network specialist treated you (an anesthesiologist, radiologist, or surgeon you didn't choose), you cannot be billed more than your in-network rate for that service.
• Air ambulance services — out-of-network air ambulance companies are covered by the Act and cannot balance-bill you beyond your in-network cost-sharing.

Why ER bills are the most error-prone bills in healthcare

Emergency department bills have some of the highest error rates of any medical billing. Here's why:

• Multiple providers, multiple bills. Your ER visit may generate separate bills from the hospital facility, the emergency physician group, a radiologist who read your X-ray, a cardiologist who was consulted, and a laboratory. Each bills separately, and errors multiply.
• Upcoding is common in the ER. Emergency visit codes run from Level 1 (simple) to Level 5 (complex, CPT 99285). Level 5 visits cost $1,500-$2,500 and should be reserved for the most complex cases. Studies have shown that many hospitals routinely bill Level 4 or Level 5 for visits that should be Level 2 or Level 3.
• Charges for services not received. In the chaos of an ER, items get added to your bill that were never used — supplies opened but not used, consultations ordered but never completed, medications drawn but not administered.

Step by step: how to fight an ER bill

1. Request the itemized bill and your medical records simultaneously. You need both to compare what was documented against what was billed.
2. Check whether the No Surprises Act applies. If you had insurance and this was an emergency visit, your maximum out-of-pocket should be your plan's in-network cost-sharing. If you were billed more, that may be an illegal balance bill.
3. Verify each provider separately. If you received multiple bills from different providers, check each one's network status with your insurer. The ER facility being in-network does not mean the ER physicians are in-network — but under the No Surprises Act, you're still protected.
4. Challenge the visit level. Ask your provider or a billing advocate to review whether the E/M (Evaluation and Management) level billed matches the documentation in your chart.
5. Submit a No Surprises Act complaint if needed. You can file a complaint at cms.gov/nosurprises if you believe you were illegally balance-billed. The complaint process can result in the insurer and provider resolving the dispute directly.

What if you didn't have insurance?

Uninsured patients have different but still significant protections. Nonprofit hospitals must offer charity care, and many hospitals have financial assistance programs that can dramatically reduce or eliminate your bill based on income. Hospitals are also required to provide a Good Faith Estimate of costs to uninsured patients before non-emergency services — if the final bill significantly exceeds the estimate, you can dispute it through the Patient-Provider Dispute Resolution process.