What does this medical bill mean?

A medical bill lists what a provider charged. Compare it with your insurer's Explanation of Benefits (EOB) before paying: the EOB shows what insurance allowed, paid, and what you may owe. Our free bill decoder explains each line in plain English.

How do I appeal a CO-45 denial?

CO-45 means the charge exceeded the contracted or allowed amount, and the difference is usually the provider's write-off, not yours. Confirm with your EOB, ask the provider to adjust the bill, and use our free CO-45 appeal letter builder if needed.

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Questions about a medical bill?

Start with the provider’s billing department

“I’m calling to understand this bill before I pay. Can we review the charges, how insurance processed the claim, and what amount I’m responsible for?”

Three things to do on the call

1.Ask for an itemized bill and compare it with your insurer’s Explanation of Benefits (EOB). An EOB is not a bill.
- Your medical bill rights (CMS)
  The official explanation of the federal protections, plus the complaint form.
2.Ask them to hold the account from collections while you review, and get it in writing.
- File a complaint (CFPB)1-855-411-2372
  Federal complaint route for debt collectors and credit-report errors. They must respond.
3.Ask about financial assistance or a payment plan. Write down the name, date and reference number.
- Dollar For — hospital charity care help
  Non-profit that checks whether your hospital bill qualifies for charity care and helps you apply.

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