Common Medical Billing Errors That Cost Patients Thousands

Medical bills often have mistakes. These errors can double or triple what you owe if not caught. Knowing the usual billing errors can help you spot them before you pay. Below are the most common pitfalls to look for — each one is something you can identify and question.

1. Duplicate or Extra Charges

• Duplicate line items. Sometimes the same service is accidentally billed twice. Example: two charges for the same X-ray.
• Unnecessary "upgrades." Extra charges like a "private room fee" or premium equipment fees that you didn't request.
• "Catch-all" charges. Some hospitals add miscellaneous fees (like a "hospital fee" for every visit). While not always errors, question any unexplained flat fees.

2. Services Not Provided

• Phantom treatments. Charges for services you never received — lab tests or procedures you didn't undergo. These could be simple billing errors or older codes left on file.
• Leftover prior-care bills. If you were recently transferred from another facility or doctor, older charges might mistakenly appear on your bill.

3. Incorrect Billing Codes

• Upcoding. Being billed for a more expensive procedure than what was performed. For example, coding a minor wound cleaning as a major surgical procedure.
• Coding with wrong modifiers. Medical codes often have letters (modifiers) that specify details. If a required modifier is missing or wrong, insurers might pay less and you could be billed the difference.
• Out-of-network when it shouldn't be. If a facility is in-network, all associated services should be too. Check that services like anesthesia or lab work aren't mistakenly coded out-of-network, which would increase your share of the bill.

4. Inaccurate Personal Information

• Wrong insurance on file. If the hospital used the wrong insurance ID or plan, they may bill you as a self-pay patient by mistake.
• Patient mix-ups. Rarely, providers put someone else's treatment on your bill. Make sure the patient name and details are correct on each charge.

5. Unapplied Payments or Insurance Negotiations

• Insurance adjustments. If your insurer negotiated the price down (common for in-network care), ensure the final bill reflects that. Sometimes the reduced amounts don't get applied correctly.
• Prior payments not credited. If you paid a deposit or copay, verify it was subtracted. If it's missing, you could end up paying twice.

6. Improper Facility Fees

• Facility fees in the wrong setting. Hospitals charge facility fees for the emergency room or outpatient clinic. If you were treated in a place without a fee (like a doctor's office), you shouldn't see a hospital facility fee.
• Emergency room billing for minor visits. Paying full ER rates for a short visit might be negotiable if your care was minimal.

How to Spot and Fix These Errors

• Line-by-line check. Compare each charge to what actually happened. Google unfamiliar terms — you can look up CPT codes to see exactly what was billed.
• Ask for explanations. Hospitals must explain charges if you ask. Call their billing office and go through the list item by item.
• Use a dispute tool. Result.Law's Medical Bill Dispute tool helps you identify which errors apply to your case and which federal laws give you the right to dispute them.

These errors are surprisingly common — studies have found that a large percentage of medical bills contain at least one mistake. Catching them can save hundreds or even thousands of dollars. Always double-check your bills before paying.

This article is for informational purposes only and does not constitute legal advice.