If your emergency room bill just arrived and the number feels wrong — you’re not imagining it. ER bills are among the most complex documents in American healthcare. They’re built from dozens of separate charges, coded by billing teams whose job is to maximize reimbursement, and processed through insurance systems that most patients have never had to understand before.
The problem isn’t that patients are bad at math. It’s that auditing a medical bill requires expertise most people simply don’t have — and shouldn’t have to develop after an already frightening night in the emergency room.
That’s exactly why Reconcile exists.
Emergency room bills regularly reach $2,000 to $20,000 — even for visits that felt routine. Understanding why requires knowing what’s actually being charged.
An ER bill is rarely a single charge. It’s a stack of separate line items that can include:
• Facility fee - just for using the emergency room
• Emergency Physician - physician's time & effort
• Imaging - X-rays, CT scans, MRIs
• Laboratory tests - each with its own billing code
• Medications and supplies administered during the visit
• Specialist consultations, if any were involved
Each of these has its own billing code, its own charge, and its own opportunity for error. And because these charges come from multiple billing systems — the hospital, the physician group, the lab — they don’t always line up correctly.
The largest single line item on most ER bills is the facility fee — the hospital’s charge for using the emergency room itself. It exists separate from anything the doctor does or any test that’s run. You owe it the moment you walk through the door.
Facility fees are classified ona scale from Level 1 (minor) to Level 5 (critical). The higher the level, the significantly higher the charge. A Level 5 can cost thousands of dollars more than a Level 3 — for the same physical experience from the patient’s perspective.
Hospitals assign these levels based on clinical criteria that are rarely explained to patients. And here’s what matters: the level assigned directly affects how much you owe. If a visit is coded at Level 4 or Level 5 when the documentation supports Level 3, both you and your insurer are being overcharged.
Here's a real-life example:
15-month-old patient with no significant medical problems was brought into the ER with fever and rapid breathing. Vitals were taken and a brief physical exam was conducted, where no abnormalities were observed. Rapid combination Flu/RSV/Covid test was ordered and results showed that she was positive for Flu A. Due to her young age, the physician decided there would be no benefit of starting Rx and discharged her to go home to rest.
In this example, clinical decision-making was documented as LOW, so the CPT code should have been charged as 99823. However, the itemized bill displayed a charge of 99285.
Below is an illustration of the pricing differences between a Level 3 and a Level 5.
By correcting this bill, the patient saved $490 and the health plan was reimbursed almost $2,000.
Not every ER bill contains errors, but certain issues show up often.
You may want to run an audit if:
The more complex visits often mean more billing details - and more room for mistakes.
