Guides4 min read

How to ask for a medical bill correction or refund, with a letter template

Finding a billing error is only half the job. Getting it corrected is a separate skill, and most of it comes down to making your request easy to approve.

Start with the right organization

A lot of wasted effort goes into asking the wrong party. Sort the problem first:

The bill asks for more than the EOB says you owe: the provider's billing office.
A payment wasn't credited, or you were billed twice: the provider's billing office.
You are owed a refund or have a credit balance: the provider's billing office.
The network discount was billed to you: the provider's billing office, and let your insurer know.
The wrong copay or coinsurance was applied: your insurer.
A deductible was charged where your plan waives it: your insurer.
Your deductible or out-of-pocket total is missing a claim: your insurer.
A service was denied and you believe it is covered: your insurer, through a formal appeal.
A required authorization was never obtained: the provider, with the insurer's explanation as evidence.
The service was coded incorrectly: the provider first, then ask your insurer to reprocess.

Five rules for the request

Put it in writing, even if you also call. After a call, send a short note summarizing what was agreed and who you spoke with.
One issue per letter. A letter with four problems tends to get one answer, usually about the easiest.
Quote the documents. Give the claim number, the date of service, the exact figure and where it appears.
Ask for one specific action. "Please correct the balance to $118" gets a clearer answer than "please look into this."
Set a date and follow up. Ask for a reply within 30 days and put a reminder in your calendar. Many valid requests stall through silence rather than refusal.

A letter you can adapt

This example covers the most common case: a bill that asks for more than the EOB says you owe.

[Date]

[Provider billing office name and address]

Re: [Patient name], account [number], claim [number], date of service [date]

I am writing about one discrepancy on the account above.

Your statement dated [date] asks me to pay [$amount] for this service. The Explanation of Benefits from [insurer] for the same claim and date of service lists my responsibility as [$amount], a difference of [$amount].

Please correct the balance to [$amount] and send me an updated statement. If you believe the amount requested is correct, please explain in writing why the difference is billable to me.

I have enclosed copies of the Explanation of Benefits and your statement. I would appreciate a reply within 30 days. You can reach me at [phone] or [email].

Thank you,

[Name]

If the answer is no

A first refusal is a step, not the end. Escalate in order and keep copies of everything:

Ask for the reason in writing. A refusal that has to be written down is sometimes reconsidered.
Ask for a supervisor or billing manager, and refer to your written request by date.
For insurer decisions, use the plan's internal appeal and meet its deadlines. If the internal appeal is denied, an independent external review is usually available.
If your coverage comes through work, contact your employer's benefits team. They often have more leverage with the insurer than an individual member does.
File a complaint if you need to. Your state insurance department handles complaints about fully insured plans. Many employer plans are self-funded and are overseen by the U.S. Department of Labor instead, so check which applies to you.

Keep a file

One folder per claim: the bill, the EOB, your receipts, every letter in both directions, and a dated log of calls with names. Disputes are won on records.

Insured Guard prepares a draft letter like this for each finding, with the figures and document references filled in, so you can review it and send it yourself.

General information, not legal, medical or financial advice. Every plan is different, so check the details against your own plan documents.