The Form She Signed Before a $1,800 MRI Left Her With the Whole Bill. It’s Called an ABN.

One Page in the Clipboard Stack

The clipboard comes with the usual pile: intake form, privacy acknowledgment, medication list, and one page titled “Advance Beneficiary Notice of Noncoverage.” otherwise known as ABN. A hypothetical 71-year-old on Original Medicare is scheduled for an MRI. The notice says the imaging center believes Medicare may not cover it and estimates her cost at $1,800. She checks the first box, signs where the receptionist points, and proceeds with the test.

Two months later, Medicare denies the claim. Because the imaging center gave her a valid warning before the MRI and she elected to receive the service, the $1,800 bill belongs to her unless she successfully appeals. The ABN is not routine intake paperwork. It is a transfer of financial risk from the provider to the patient.

What the Form Actually Does

An ABN is used when a provider believes Original Medicare may deny payment for a service that Medicare sometimes covers. The concern might be medical necessity, the frequency of the service, or whether the patient’s diagnosis meets a particular coverage rule. The notice is the provider’s prediction, not an official Medicare decision. Medicare has not denied anything when the form is presented.

A valid ABN gives the patient a choice before the service occurs. If the patient receives the service after being properly warned and Medicare later denies payment, the provider may hold the patient responsible for the amount identified on the notice. ABNs are used with Original Medicare. Medicare Advantage plans have their own coverage notices and appeal procedures.

Three Boxes, Three Different Outcomes

The current ABN contains three options. The signature matters, but the selected box determines what happens next.

• Option 1: The patient wants the service and wants the provider to bill Medicare. The provider may request payment up front. If Medicare pays, the provider refunds the appropriate amount. If Medicare denies the claim, the patient can appeal.
• Option 2: The patient wants the service but does not want the provider to bill Medicare. The patient pays directly and gives up the opportunity to appeal because Medicare never receives a claim.
• Option 3: The patient declines the service. No claim is submitted, no appeal is available, and the patient does not owe for a service that was never provided.

For someone who believes Medicare should cover the MRI, Option 1 is generally the only choice that preserves a path to an official decision and an appeal. Option 2 can look like the quicker version of the same choice. It is not. It removes Medicare from the transaction.

A Valid ABN Cannot Be Vague

The notice should identify the specific service, explain why Medicare is expected to deny it, and provide a good-faith cost estimate. “Medicare may not pay” by itself is not much of an explanation. A useful notice might say that the test exceeds Medicare’s frequency limit or that the diagnosis supplied by the ordering physician does not support coverage. That distinction can matter before the appointment begins. A missing diagnosis code or incomplete order may be correctable. A service that genuinely falls outside Medicare’s coverage rules presents a different choice.

The provider should deliver the ABN far enough in advance for the patient to consider the options. Blank forms, blanket notices covering every possible service, or forms presented under pressure may be defective. If Medicare denies the claim and the notice was not valid, the provider may be unable to shift the bill to the patient. Refusing to sign is not necessarily an escape hatch. A provider can document that the notice was presented and the patient refused to sign. The useful move is to understand the choice, not simply push the clipboard back.

What to Do Before the MRI

Three steps protect the patient’s options:

1. Read the reason Medicare may deny the service and the estimated cost. If either space is blank or generic, ask the provider to complete it before signing.
2. If you want the service and believe Medicare may cover it, consider Option 1 so the provider submits the claim and your appeal rights remain intact.
3. Ask for a copy of the completed ABN. If Medicare denies the claim, compare the notice with the Medicare Summary Notice and follow the appeal instructions. Original Medicare appeals generally must be received within 120 days of the notice date.

An ordering physician may be able to provide medical records, diagnosis information, or an explanation of why the service was necessary. Those documents can strengthen an appeal when the dispute turns on incomplete coding or documentation. An ABN gives the patient a real choice. That is precisely why it should never be treated as a formality. The appointment may last 30 minutes. The box checked before it begins can decide who pays the entire bill.

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