Top 10 Medical Billing Errors and How to Spot Them
Learn about the most common medical billing mistakes that could be costing you thousands of dollars.
Medical billing errors are surprisingly common, with studies showing that a significant percentage of medical bills contain mistakes. These errors can add hundreds or even thousands of dollars to your bill. Here are the top 10 errors you should watch for.
1. Duplicate Charges
One of the most common errors is being charged twice for the same service, medication, or procedure. This often happens during shift changes or when billing departments merge records from different departments.
How to spot it: Look for identical line items with the same date, time, and description. Even if the charge amounts differ slightly, they might be duplicates.
2. Unbundling (Fragmented Billing)
Unbundling occurs when a hospital bills separately for services that should be combined into one charge. For example, if you had blood work done, the hospital might charge separately for drawing the blood, the lab analysis, and the supplies, when these should be bundled together.
How to spot it: Look for multiple small charges related to a single procedure. Medicare's National Correct Coding Initiative (NCCI) defines which procedures should be bundled together.
3. Upcoding
Upcoding happens when you're billed for a more expensive service than what you actually received. For instance, being charged for a complex procedure when you only had a simple one, or being billed for a brand-name medication when you received a generic.
How to spot it: Compare the CPT codes on your bill with the actual services you received. If you're unsure, ask your doctor what level of service was provided.
4. Services You Never Received
Sometimes bills include charges for procedures, tests, or medications that were never provided. This can happen due to clerical errors or mix-ups with another patient's records.
How to spot it: Review every line item carefully. If you don't recognize a service, ask for clarification. Keep notes about your care to help verify what actually happened.
5. Incorrect Quantity
You might be charged for more units of a medication, more days in the hospital, or more physical therapy sessions than you actually received.
How to spot it: Track your medications, therapy sessions, and hospital days. Compare these records with your bill's quantities.
6. Canceled Services or Procedures
If a test or procedure was ordered but then canceled before it was performed, you shouldn't be charged for it. However, billing systems may not always be updated when services are canceled.
How to spot it: If you remember a procedure being scheduled but not performed, check if it appears on your bill.
7. Operating Room Time Errors
Hospitals charge by the minute for operating room use. Errors in recording when your surgery started and ended can result in overcharges of hundreds or thousands of dollars.
How to spot it: If you had surgery, ask for the anesthesia records, which typically have accurate start and end times. Compare these to the OR charges.
8. Out-of-Network Charges at In-Network Facilities
Even when you go to an in-network hospital, you might be treated by out-of-network providers (like anesthesiologists, radiologists, or emergency room doctors) without your knowledge or consent. Thanks to the No Surprises Act, you have protections against many of these charges.
How to spot it: Check if any providers listed on your bill are out-of-network. If the service was emergency care or you had no choice in the provider, you may be protected from balance billing.
9. Keystroke/Data Entry Errors
Simple typos can turn a $100 charge into a $1,000 charge. A misplaced decimal point or an extra zero can dramatically inflate your bill.
How to spot it: If a charge seems unusually high compared to similar items, it might be a data entry error. Compare prices across line items and look for outliers.
10. Failure to Apply Insurance Properly
Sometimes bills show charges that should have been covered by your insurance. This can happen if the hospital has outdated insurance information, codes the claim incorrectly, or fails to submit it properly.
How to spot it: Compare your Explanation of Benefits (EOB) from your insurance company with your bill. If they don't match, contact both the hospital and your insurer to resolve the discrepancy.
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What to Do If You Find Errors
If you discover any of these errors on your medical bill:
- Document everything: Take photos, make copies, and keep detailed notes
- Contact the hospital's billing department immediately
- Request an itemized bill if you don't already have one
- File a formal appeal in writing
- Don't pay disputed charges while the appeal is pending
- Consider using Health Bill Central to help identify errors and generate appeal letters
Pro Tip: Always request an itemized bill rather than just a summary. Itemized bills show every charge in detail, making it much easier to spot errors.
If you find errors on your bill, learn how to appeal a medical bill step by step. You may also qualify for charity care programs that can reduce your bill even further.
The Bottom Line
Medical billing errors are not just common—they're the norm. By carefully reviewing your bills and watching for these top 10 errors, you can potentially save thousands of dollars. Don't be afraid to question charges and demand corrections. It's your right as a patient, and the hospitals are legally required to provide accurate billing.
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