What to Do When You Get a Surprise Medical Bill

You expected to pay your normal cost-share for that ER visit or outpatient procedure — then a bill arrived from a provider you didn't even choose, for an amount that looks nothing like what you budgeted. Here's what you can actually do about it.

What counts as a "surprise bill"

A surprise bill typically comes from an out-of-network provider you didn't know would be involved in your care. Common scenarios:

• An out-of-network anesthesiologist or assistant surgeon at an in-network facility
• An air ambulance transport during an emergency
• An out-of-network emergency physician at an in-network hospital

The No Surprises Act, which took effect January 1, 2022, created federal protections for most of these situations. Under the law, if you receive emergency care or certain non-emergency services at an in-network facility, out-of-network providers generally cannot bill you more than your in-network cost-sharing amount. That protection applies to most private insurance plans, including employer-sponsored coverage and marketplace plans. It does not automatically cover all situations — ground ambulance, for example, is not currently included in the federal law, though some states have their own protections.

CMS maintains a full explanation of your rights under the No Surprises Act, including which plan types are covered.

Start here: get the itemized bill

Before you dispute anything, you need to know exactly what you're being billed for. Ask the provider's billing department for an itemized bill — a line-by-line list of every charge, including the billing code (called a CPT code) attached to each service.

Hospitals and providers are required to give you this. Don't accept a summary statement that just says "facility fee" or "professional services." You want specifics.

Once you have it, look for:

• Duplicate charges — the same service billed twice
• Charges for services you don't recall receiving
• Upcoding — a simple procedure billed under a more complex (and expensive) code
• Unbundling — related services that should be billed together charged as separate line items at a higher combined rate

You don't need to know every billing code by heart. If a charge looks unfamiliar, call the billing department and ask them to explain it in plain language. Write down who you spoke with and when.

Talk to the billing department first

Many billing errors and inflated charges get resolved before you ever need to file a formal dispute. When you call, keep your tone factual and specific:

• Reference the itemized bill line by line
• Ask billing staff to verify that each service matches your medical record
• If you were charged an out-of-network rate for a provider at an in-network facility, cite the No Surprises Act by name and ask them to reprocess the claim at your in-network cost-sharing rate

Get any agreement or correction in writing — ask them to send you an updated bill or a letter confirming what was adjusted.

If the charge is legitimate but the total is more than you can pay at once, ask whether the provider offers a payment plan or financial assistance program. Most hospitals — especially nonprofit hospitals, which have charity care obligations under IRS rules — have programs for patients who qualify.

When to bring your insurer into it

Your insurer is a useful ally when:

• A claim was denied and you believe it should have been covered
• You received out-of-network charges that fall under No Surprises Act protections and the provider hasn't corrected the bill
• The Explanation of Benefits (EOB) — the document your insurer sends after a claim is processed — doesn't match what the provider is billing you

Call the member services number on your insurance card and tell them you're disputing a bill. Ask them to open a claim review. If the insurer agrees the bill violates No Surprises Act protections, they'll contact the provider directly.

Keep a paper trail. Every call should be logged: date, representative's name, and what was discussed. Follow up calls with a brief email to the insurer's member services address summarizing what was agreed.

Filing a formal complaint

If the billing department won't budge and your insurer can't resolve it, you have escalation options.

File a complaint with CMS. If you believe a provider billed you in violation of the No Surprises Act, you can submit a complaint at cms.gov. CMS can investigate and has authority to impose penalties on providers who violate the law.

Contact your state insurance commissioner. State regulators handle complaints about insurance companies. Most states have an online complaint portal — search "[your state] department of insurance complaint."

Request an independent dispute resolution (IDR). The No Surprises Act set up a federal IDR process, though it's primarily designed for disputes between providers and insurers rather than individual patients. Your insurer handles the IDR process on your behalf when it applies, which is another reason to keep them looped in.

Seek help from a patient advocate. Hospital patient advocates (sometimes called patient representatives) are on staff and can intervene with billing on your behalf at no cost. Independent patient advocates — often certified through the Patient Advocate Foundation or similar organizations — can also help with complex disputes, sometimes at low or no cost.

Timelines matter

Don't let bills sit. Most providers have a window — often 30 to 90 days — before they send accounts to collections. If you're in the middle of a dispute, send a written notice to the billing department saying the bill is under dispute and you expect them to pause collection activity. Keep a copy.

If a bill does go to collections while you were actively disputing it, document your dispute timeline. The Consumer Financial Protection Bureau has resources on your rights when dealing with medical debt collectors.

Where to go from here

If you're looking for in-network providers to reduce the chance of a surprise bill on your next visit, search the ProviderQuoHealth directory and filter by insurance. If you want to understand how in-network vs. out-of-network billing typically works for a specific specialty, browse our specialty pages to learn what a standard care episode looks like before you book.

Important note

This article is for general information and is not medical advice. It is not a substitute for professional care from a licensed clinician. If you have a medical concern, talk to a healthcare provider. If you are experiencing a medical emergency, call 911 (in the U.S.) or your local emergency number.