How to Dispute a Medical Bill

The short answer: To dispute a medical bill, request an itemized bill, compare it line by line against your Explanation of Benefits (EOB), keep a dated record of every call, and submit a written dispute to the provider and insurer identifying the specific errors. If it isn't resolved, escalate — to your state Insurance Commissioner for insurer issues, or your state Attorney General's consumer division for billing practices. A documented dispute that names the specific errors is how they get corrected.

How do I check a medical bill for errors?

Request an itemized bill (not a summary), then compare it line by line against your EOB from the insurer. Look for duplicate charges, services you never received, wrong billing codes, and out-of-network surprises. The itemized bill is where errors are visible — you cannot dispute what you cannot see, so getting it is the essential first step.

What should I document?

• The itemized bill and your EOB side by side, so the gaps are visible.
• A dated log of every phone call date, time, who you spoke to, and what was said.
• All written correspondence with the provider and the insurer.
• The specific charges you dispute and why — duplicate, wrong code, service not received.

Promises made on the phone can be hard to rely on later, so your dated call log is what you point to when you follow up.

Start documenting a medical bill →

How do I dispute the bill?

Put it in writing to the provider’s billing department and, where the insurer is involved, to them too. Reference the itemized bill and EOB, identify each disputed charge, and explain why — duplicate, wrong code, service not received. Keep a dated copy. A written, specific, documented dispute is far harder to brush off than a phone complaint.

Who do I escalate a medical billing dispute to?

It depends on the source of the problem. If it is the insurer wrongly denying or underpaying, your state Insurance Commissioner handles that. If it is the provider's billing practices, your state Attorney General's consumer protection division. For surprise out-of-network bills, federal protections may apply — check whether they cover your situation. You escalate with your documented record of the error and your dispute.

What's the escalation path?

Typically:

1. Get the itemized bill and dispute specific errors in writing with the provider and insurer.
2. If unresolved, escalate to the relevant authority — Insurance Commissioner or state Attorney General.
3. If needed, small claims or legal action.

Your documented dispute carries through each step.

When should I start documenting?

The moment a bill looks wrong. Start with the itemized bill and EOB, log every call, and keep every letter. A dated trail is far stronger than reconstructing weeks of phone calls later.