How to Dispute a Medical Bill
Medical billing errors are remarkably common. Studies estimate that up to 80% of medical bills contain errors, and these mistakes can cost patients hundreds or thousands of dollars. Whether you have been overcharged, billed for services you did not receive, or charged more than your insurance should allow, you have the right to dispute the bill and seek a correction.
Step 1: Request an Itemized Bill
Before you can dispute a bill, you need to understand exactly what you are being charged for:
Request an itemized statement — Call the provider's billing department and ask for a detailed, itemized bill that lists every charge individually with CPT (Current Procedural Terminology) codes and diagnosis codes.
Compare to your Explanation of Benefits (EOB) — Your insurance company sends an EOB after processing each claim. Compare the itemized bill to the EOB to identify discrepancies.
Request your medical records — Your medical records document what services were actually provided. Compare them to the billed services.
Step 2: Identify Errors
Common medical billing errors include:
Duplicate charges — Being billed twice for the same service or procedure.
Unbundling — Billing individual components of a procedure separately when they should be billed as a single procedure at a lower total cost.
Upcoding — Using a billing code for a more expensive procedure than what was actually performed.
Incorrect patient information — Wrong insurance ID, date of birth, or policy number leading to claim denial.
Balance billing — Billing you for the difference between the provider's charge and the insurance-allowed amount, which is illegal for in-network providers and in many emergency situations under the No Surprises Act.
Services not rendered — Charges for services, tests, or supplies you did not actually receive.
Incorrect quantities — Being billed for more units of a medication or supply than you received.
Step 3: Contact the Billing Department
Once you have identified potential errors:
Call the provider's billing department — Explain the specific errors you have found and request corrections. Be polite but firm.
Document everything — Note the date, time, and name of every person you speak with. Follow up phone calls with written correspondence.
Ask for a corrected bill — After the provider reviews your dispute, request an updated itemized bill reflecting any corrections.
Request a billing review — If the billing department disagrees with your assessment, ask for a formal billing review or audit.
Step 4: Appeal to Your Insurance Company
If your insurance company denied coverage or underpaid a claim:
File an internal appeal — Under the Affordable Care Act, you have the right to appeal any coverage denial. Your insurer must provide information about the appeals process in the denial letter.
Provide supporting documentation — Include medical records, letters from your doctor explaining medical necessity, and any relevant clinical guidelines.
External review — If your internal appeal is denied, you have the right to an external review by an independent third party. This decision is binding on the insurer.
State insurance department — File a complaint with your state's department of insurance if you believe your insurer is acting improperly.
Step 5: Know Your Rights Under the No Surprises Act
The federal No Surprises Act (effective January 2022) provides important protections:
Emergency services — You cannot be balance-billed for emergency services, regardless of whether the provider or facility is in-network.
Non-emergency services at in-network facilities — If you receive care from an out-of-network provider at an in-network facility (such as an out-of-network anesthesiologist), you are only responsible for your in-network cost-sharing.
Good faith estimates — Uninsured and self-pay patients have the right to receive a good faith estimate of expected charges before receiving non-emergency services. If the actual bill exceeds the estimate by $400 or more, you can dispute it through a federal process.
Independent dispute resolution (IDR) — The Act establishes an IDR process for resolving billing disputes between patients and providers.
Step 6: Negotiate the Bill
Even if the bill is technically accurate, you may be able to negotiate a lower amount:
Ask for the cash price — Providers often charge insured patients more than uninsured patients. Ask what the cash or self-pay price would be.
Request a payment plan — Most providers offer interest-free payment plans. Getting on a payment plan also prevents the bill from being sent to collections.
Ask about financial assistance — Nonprofit hospitals are required to have financial assistance policies (charity care). Ask for an application.
Offer a lump-sum settlement — If you can pay a portion immediately, the provider may accept a reduced amount as payment in full.
Reference fair pricing — Use resources like Healthcare Bluebook or FAIR Health to determine reasonable charges for the services you received.
Step 7: Protect Your Credit
Medical debt should not damage your credit unnecessarily:
New credit reporting rules — As of 2023, the three major credit bureaus no longer include medical debts under $500 on credit reports, and paid medical debts are removed.
Dispute inaccurate collection accounts — If a medical debt appears on your credit report that you believe is incorrect, dispute it with the credit bureau in writing.
Validate the debt — If a collection agency contacts you, request written validation of the debt within 30 days under the Fair Debt Collection Practices Act.
Disclaimer: Medical billing laws vary by state. Some states have additional patient protections beyond federal law. Consult a patient advocate or consumer protection attorney for assistance with complex billing disputes.