Medical Bill Review
Your guide to finding and fixing medical billing errors. We built this hub because up to 80% of medical bills contain mistakes - and most people don't know how to spot them. Whether you just received a confusing bill or you're dealing with a charge that doesn't look right, start here.
Find Every Error
Guides & Resources
Duplicate Charges on Medical Bills: How to Find and Dispute Them
Duplicate charges are the top medical billing error. Learn to identify double-billed services, what causes them, and how to get them removed from your bill.
Anatomy of an ER Bill: Every Line Item Explained
Break down every charge on your ER bill - facility fees, physician charges, and ancillary services. Learn what is normal, what is inflated, and what to dispute.
Imaging and Lab Test Overcharges: MRI, CT, and Blood Work Billing Guide
MRIs, CT scans, blood panels, and lab work are routinely overcharged. Learn fair prices for common tests, spot errors, and dispute inflated imaging charges.
Why Your Pharmacy Bill Might Be Wrong: Drug Billing Errors Explained
Pharmacy billing errors are common. Learn how drug pricing works, what errors to look for on your pharmacy receipts, and how to get overcharges corrected.
Surgery Billing Errors: What to Check Before You Pay
Surgical bills are the most error-prone. Learn what billing errors appear in surgery bills, from unbundling to implant overcharges, and how to dispute them.
How Much Does an Emergency Room Visit Really Cost? A Complete Breakdown
The average ER visit costs $2,200 with insurance and $3,500+ without. Learn how ER bills are structured, why they're so high, and how to fight overcharges.
Medical Billing for Small Business Owners: What You Need to Know About Employee Health Plan Audits
Learn why small businesses should audit employee health plan claims. Covers common billing errors, audit methods, ROI, and how to reduce plan costs.
CPT Codes, HCPCS, ICD-10, and Modifiers: A Plain-Language Guide to Medical Billing Codes
Every charge on your medical bill is tied to a code. Learn what CPT, HCPCS, ICD-10, and modifiers mean in plain English and how coding errors cause overbilling.
Medical Bill Review Checklist: 18 Steps to Catch Every Error
Use this 18-step checklist to systematically review your medical bill for errors, overcharges, and billing mistakes. Printable and free.
The State of Medical Billing Errors in America: A 2025 Data Report
A data report on medical billing errors in America, covering error rates, financial impact, root causes, and how automated review catches what auditors miss.
The 5 Most Common Medical Billing Errors (And How to Spot Them)
Discover the five most common medical billing errors - from duplicate charges to NCCI violations - and learn how to spot them on your bills before you overpay.
Understanding Your Explanation of Benefits: A Complete Guide
Learn how to read your Explanation of Benefits (EOB), understand each section, spot red flags, and use it alongside your itemized bill to find billing errors.
How NilesAI's 16 Scan Engines Catch What Manual Review Misses
Learn how NilesAI's 16 scan engines - from NCCI bundling to fee schedule variance - use deterministic rules to find billing errors other tools miss.
How to Review Your Medical Bill: A Step-by-Step Guide
Follow this step-by-step guide to review your medical bill for errors, compare it to your EOB, verify CPT codes, and dispute overcharges with confidence.
Is My Bill Wrong?
What kind of medical bill do you have?
Select the type that best describes your bill.
Tell us about your bill
Check for red flags
Answer Yes or No for each question.
Is the amount different from what your insurance EOB shows?
Do you see the same service listed more than once?
Were you treated by an out-of-network provider you didn't choose?
Did the provider refuse to give you an itemized bill?
Is the total significantly higher than you expected?
Were you billed separately by multiple providers for one visit?
ER-specific question:
Were you admitted overnight (observation vs inpatient)?
Your Bill Diagnostic Results
Your bill looks reasonable, but it's still worth double-checking. We found some warning signs worth investigating. Your bill has multiple red flags - take action.
What to do next
- 1
Request an itemized bill and verify each line item matches the services you received.
- 2
Compare against your EOB from your insurance company if applicable.
- 3
Keep records of all bills and payments. If something seems off, don't hesitate to call and ask questions.
- 1
Request an itemized bill immediately — you have a legal right to one. Review every CPT code.
- 2
Contact your insurance company and request a detailed EOB. Compare it line-by-line against your bill.
- 3
Do not pay until discrepancies are resolved. Contact the provider's billing department in writing.
- 1
Do not pay this bill yet. Request a complete itemized statement and your full medical records for this visit.
- 2
File a formal dispute in writing with both the provider and your insurance company. Cite specific line items.
- 3
Consider using a professional bill review service like NilesAI to identify every error and build a dispute case.
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