Procedure guidesBillSherpa · Updated 2026

ER Visit Billing Errors — What You Should and Shouldn't Be Charged

Emergency room bills are the most error-prone bills in healthcare. Multiple providers billing separately, chaotic documentation, high-value codes, and patients too stressed to think about billing — it's a perfect environment for errors to accumulate. Studies show ER bills have some of the highest error rates of any medical billing category. Here's what those errors look like and how to catch them.

Why ER bills are uniquely complicated

A single ER visit typically generates multiple separate bills:

The facility bill — from the hospital for the room, nursing care, equipment, and supplies
The physician bill — from the emergency physician group (often a separate company contracted by the hospital)
Specialist bills — from any consultants who were called in (cardiologist, surgeon, etc.)
Radiology bill — from the radiologist who read your imaging (often a separate group)
Laboratory bill — sometimes from a third-party lab

Each of these billers has their own billing systems, their own staff, and their own opportunities to make errors. A patient who feels they received one service often receives four or five separate bills.

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The most common ER billing errors

Upcoding the E/M visit level

CPT 99281–99285

Emergency department visits are coded from Level 1 (simple, CPT 99281) to Level 5 (complex, CPT 99285, $1,500–$2,500). Level 5 requires high-complexity medical decision-making — it should be reserved for the most severe cases. Studies consistently find that hospitals over-assign Level 4 and Level 5 codes. If you went to the ER for a sprained ankle or a kidney stone and received a Level 5 bill, request the physician's note and look for the medical decision-making section — it must document high complexity.

Out-of-network billing for emergency care

No Surprises Act · 42 U.S.C. § 300gg-111

Under the No Surprises Act, you cannot be balance-billed above your in-network cost-sharing for emergency care at any hospital — even if the hospital or the ER physicians are out of your network. If your EOB shows out-of-network cost-sharing applied to emergency care, that may be illegal. Your maximum responsibility is your in-network deductible and coinsurance.

Separate facility fee and physician fee for the same visit

Revenue code 0450 + separate physician bill

You'll almost always receive both a facility bill and a physician bill for an ER visit — this is normal. What's not normal is when the facility bill also includes a physician service charge, resulting in double-billing for the physician's time. Review both bills and ensure the physician's services appear only on one.

Charges for services not rendered — common in ER chaos

42 CFR § 415.102

Supplies opened "just in case" that were never used, procedures ordered but cancelled before execution, consultations requested but never completed — all common in the ER and all sometimes billed anyway. Your medical records are your evidence: every billed service must appear in the chart.

Duplicate charges for labs and imaging

Multiple CPT codes same date

Lab and imaging orders entered multiple times by nurses and physicians in the chaos of an ER visit sometimes result in duplicate billing entries. Look for the same CPT code appearing twice on the same date without a clinical justification.

Observation status billed as inpatient

Revenue code difference

If you were placed under "observation" rather than formally admitted, your cost-sharing is different — and for Medicare patients, the difference in what you owe can be substantial. Verify your admission status matches what your insurer processed.

Your rights for ER billing disputes

Request every bill separately. Get the itemized facility bill, the physician group bill, the radiology bill, and any other bills separately. Review each one individually.
Get your medical records. Request the complete ER chart — triage notes, physician notes, nursing notes, all orders, imaging reports, and lab results. Compare every billed service against the chart.
Invoke the No Surprises Act for out-of-network billing. If any provider — including the ER physician group — is billing you at out-of-network rates for emergency care, reference 42 U.S.C. § 300gg-111 in your dispute letter. Your responsibility is capped at your in-network cost-sharing.
Challenge the E/M level if warranted. If a Level 4 or 5 code was assigned to a straightforward visit, request the physician's note and the medical decision-making documentation. If the documentation doesn't support the level, the code is upcoded.
File with CMS if balance-billed. Report No Surprises Act violations at cms.gov/nosurprises.

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ER billing checklist

Request itemized bills from all providers who billed me (facility, ER physician, radiologist, specialists)
Request my complete ER medical records
Compare my EOB to each bill — confirm patient responsibility matches
Check E/M level (99281–99285) against physician note complexity documentation
Look for any duplicate lab or imaging codes on the same date
Verify no out-of-network rates applied to emergency care (No Surprises Act)
Check that all billed supplies and procedures appear in my medical records
Verify admission status — observation vs inpatient — matches how I was billed

Frequently asked questions

I didn't choose the ER or the ER doctors. Am I still responsible for out-of-network charges?

Under the No Surprises Act, no — not for emergency care. The fact that you didn't choose the provider is exactly what the law addresses. For emergency care, you are only responsible for your in-network cost-sharing regardless of which hospital treated you or whether its providers are in your network.

My ER bill includes a $450 charge for "ER level 5 facility fee." What is this?

Hospitals charge separate facility E/M fees for the emergency department in addition to the individual procedure codes. These run from Level 1 to Level 5, mirroring the physician codes. The same upcoding concern applies — the documented complexity of your visit should match the level charged. Revenue codes 0451–0459 correspond to the five facility ER levels.

Can I be billed for the ER if I left without being seen?

If you were triaged and registered, the hospital may bill a triage or registration fee even if you left before seeing a physician. However, the fee should be significantly lower than a full ER visit. Review the charges carefully — if you're seeing a full Level 4 or Level 5 E/M code for a visit where you left before seeing a doctor, that's a billing error.