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What to Do When You Get a Surprise Medical Bill

You went to an in-network hospital. You checked with your insurance beforehand. You did everything right. And then a bill arrives for $4,700 from an anesthesiologist you never chose, never met befo...

January 1, 2022 · 14 min read · Reviewed by Taven Health

You went to an in-network hospital. You checked with your insurance beforehand. You did everything right. And then a bill arrives for $4,700 from an anesthesiologist you never chose, never met before surgery, and who happened to be out of your network.

That's a surprise medical bill — and until recently, patients had almost no protection against them. The good news: federal law now protects you from most surprise bills. The bad news: you still need to know your rights and take action to enforce them.

This guide explains exactly what a surprise medical bill is, what laws protect you, and step-by-step what to do when one shows up in your mailbox.

What Counts as a "Surprise" Medical Bill?

A surprise medical bill (also called a "balance bill") typically happens in three situations:

1. Emergency Care at an Out-of-Network Facility

You can't choose which hospital the ambulance takes you to during a heart attack. If it's out of your insurance network, the hospital could previously bill you at their full chargemaster rate — which might be 3–10x what an in-network hospital would charge.

2. Out-of-Network Providers at an In-Network Facility

This is the most common and most frustrating scenario. You go to an in-network hospital, but individual providers within that hospital — the anesthesiologist, the radiologist, the pathologist, the assistant surgeon — may not be in your network. You had no choice in selecting these providers and often didn't even know they were involved in your care.

3. Services You Didn't Expect or Authorize

During a procedure, your surgeon might call in a specialist you didn't know about. Lab work might be sent to an out-of-network lab. An in-network imaging center might use an out-of-network radiologist to read your scan. All of these can generate surprise bills.

The No Surprises Act: Your Federal Protection

The No Surprises Act, which took effect on January 1, 2022, is the most significant federal protection against surprise medical bills. Here's what it does:

What's Protected

  • Emergency services — You can't be balance-billed for emergency care, regardless of whether the facility or providers are in your network. You pay only your in-network cost-sharing amount (copay, coinsurance, deductible).
  • Out-of-network providers at in-network facilities — If you receive care at an in-network hospital or ambulatory surgery center and an out-of-network provider treats you without your advance consent, you pay only in-network rates.
  • Air ambulance services — Out-of-network air ambulance providers cannot balance-bill you.

What's NOT Protected

  • Ground ambulances — Currently exempt from the No Surprises Act (though some states have their own protections)
  • Services where you gave written consent — If a provider notifies you they're out-of-network at least 72 hours before a scheduled service and you sign a consent form waiving your protections, the No Surprises Act doesn't apply. Be very careful about signing these waivers.
  • Post-stabilization care where you could have been transferred — After emergency stabilization, if you could safely be transferred to an in-network facility and choose to stay, protections may not apply.

How It Works in Practice

When the No Surprises Act applies, here's what should happen:

  1. You receive care from an out-of-network provider in a protected situation
  2. The provider bills your insurance company (not you) for the out-of-network portion
  3. Your insurance pays as if the care were in-network
  4. You pay only your in-network cost-sharing (deductible, copay, or coinsurance)
  5. The provider and insurer negotiate or go through independent dispute resolution (IDR) to settle the difference
  6. You are not involved in that negotiation

Your Good Faith Estimate Rights

The No Surprises Act also created the Good Faith Estimate (GFE) — a written estimate of expected charges that providers must give to uninsured or self-pay patients before scheduled services.

What You're Entitled To

  • A written estimate of all expected charges, including from other providers involved in your care (anesthesia, labs, imaging, etc.)
  • The estimate must be provided at least 1 business day before a scheduled service (3 business days if scheduled more than 10 days out)
  • The estimate must include a diagnosis code, service code, and expected charge for each item

The Dispute Process

If your final bill exceeds your Good Faith Estimate by $400 or more, you can initiate a dispute resolution process:

  1. You have 120 days from receiving the bill to start a dispute
  2. Contact the provider first and try to resolve it directly
  3. If that fails, file a dispute through the federal dispute resolution process at cms.gov/nosurprises
  4. An independent reviewer will determine the appropriate payment amount
  5. The process costs you $25 — which is refunded if the decision is in your favor

Use Taven's GFE Checker to compare your estimate against your actual bill and determine if you have grounds for a dispute.

State Protections: Additional Coverage

Many states have their own surprise billing laws that may provide even stronger protections than the federal No Surprises Act. State laws can cover situations the federal law doesn't, including:

  • Ground ambulance billing — States like Colorado, Delaware, Maine, Maryland, New York, Ohio, Vermont, and West Virginia have enacted ground ambulance balance billing protections
  • State-regulated plans — While the federal law covers most private insurance, some state-regulated plans have additional protections under state law
  • Lower cost-sharing requirements — Some states require even lower patient costs than the federal standard
  • Broader provider coverage — Some states extend protections to additional provider types not covered federally

To find your state's specific protections, contact your state insurance commissioner's office or check the National Association of Insurance Commissioners (NAIC) website.

Step-by-Step: What to Do When You Get a Surprise Bill

Step 1: Don't Pay Immediately

This is the most important step. Do not pay a surprise bill the moment it arrives. You have time, and paying before investigating waives many of your options. The bill won't go to collections tomorrow — most providers wait 90–180 days before sending accounts to collections.

Step 2: Identify What Happened

Determine which category your bill falls into:

  • Was this emergency care? → No Surprises Act protects you.
  • Was this an out-of-network provider at an in-network facility? → No Surprises Act likely protects you.
  • Did you receive and sign a consent waiver? → Check if it meets the legal requirements (72-hour notice for non-emergency, specific language about your rights).
  • Was this a scheduled service where you should have received a Good Faith Estimate? → Compare the GFE to your actual bill.

Step 3: Review Your EOB

Get your Explanation of Benefits from your insurance company for this service. Compare:

  • What the provider charged
  • What your insurance "allowed" (their negotiated or determined rate)
  • What insurance paid
  • What they say you owe

If the provider's bill is higher than what your EOB says you owe, that's a red flag. The provider may be balance-billing you illegally.

Step 4: Contact the Provider's Billing Department

Call the provider who sent the surprise bill. Be specific:

"I received a bill for [amount] for services on [date] at [facility]. I was treated at an in-network facility and did not choose this out-of-network provider. Under the No Surprises Act, I should only be responsible for my in-network cost-sharing amount. Please reprocess this bill accordingly."

Document the call: date, time, who you spoke with, what they said, and any reference numbers.

Step 5: Contact Your Insurance Company

If the provider doesn't resolve it, call your insurance company:

  • Ask them to confirm whether the No Surprises Act applies to your situation
  • Ask them to reprocess the claim at in-network rates if they haven't already
  • Ask them to contact the provider directly
  • Request a written determination of your cost-sharing responsibility

Step 6: File a Formal Dispute

If neither the provider nor your insurance resolves the issue, you have formal options:

  • No Surprises Act complaint: File at cms.gov/nosurprises or call 1-800-985-3059
  • Good Faith Estimate dispute: If your bill exceeded the GFE by $400+, file through the federal process
  • State insurance commissioner complaint: Your state's insurance department can investigate
  • Written dispute to the provider: Use our dispute letter templates to send a formal written dispute

Step 7: Use Independent Dispute Resolution (If Needed)

The No Surprises Act created an Independent Dispute Resolution (IDR) process for disputes between providers and insurers. As a patient, you shouldn't be directly involved in IDR — the dispute is between the provider and your insurer about their payment, not about your cost-sharing.

However, if a provider is trying to bill you directly despite the No Surprises Act protections, cite the law and file complaints. The provider is violating federal law.

Surprise Bills the No Surprises Act Doesn't Cover

Some surprise bills fall outside the No Surprises Act. Here's what to do in those situations:

Ground Ambulance Bills

Ground ambulance services can still balance-bill you in most states. If you receive a surprise ambulance bill:

  • Check if your state has ground ambulance protections
  • Negotiate directly with the ambulance company for a reduced rate
  • Apply for their financial assistance program (many ambulance services have them)
  • Ask your insurance to pay more — sometimes a phone call results in additional payment

Bills Where You Signed a Waiver

If you signed a consent form agreeing to out-of-network care, check whether the waiver meets legal requirements:

  • Was it provided at least 72 hours before a scheduled (non-emergency) service?
  • Did it clearly state the provider was out-of-network?
  • Did it include a good-faith estimate of charges?
  • Were you told you had the right to refuse and seek an in-network provider?
  • Was it a separate document (not buried in general consent forms)?

If the waiver doesn't meet all these requirements, it may be invalid. Consult with your state insurance commissioner.

Out-of-Network Care You Chose

If you knowingly chose an out-of-network provider, the No Surprises Act doesn't apply. But you can still:

How to Prevent Surprise Bills

Prevention is always better than fighting a bill after the fact:

Before Any Scheduled Procedure

  1. Verify the facility is in-network — Call your insurance, not just the hospital.
  2. Ask about all providers who might be involved — Surgeon, anesthesiologist, assistant surgeon, pathologist, radiologist. Ask if they're all in-network.
  3. Request in-network providers — If any provider will be out-of-network, ask the facility to assign an in-network alternative.
  4. Get a Good Faith Estimate — Even if you have insurance, ask for a written estimate of expected charges.
  5. Don't sign waivers — If asked to sign a form consenting to out-of-network care, push back. Ask why an in-network provider can't be used. You have the right to refuse.

In the ER

You can't prevent surprise bills in a true emergency — that's what the No Surprises Act is for. But after you're stabilized:

  • Ask if the facility is in your network before agreeing to non-emergency follow-up care
  • Ask to be transferred to an in-network facility if possible
  • Don't sign waivers consenting to out-of-network care while you're in a vulnerable state

Resources and Tools

The Bottom Line

Surprise medical bills were once one of the most predatory practices in American healthcare. The No Surprises Act has changed that — but only if you know your rights and enforce them.

If you receive a surprise bill: don't panic, don't pay immediately, and don't assume you owe what it says. Review your EOB, determine if the No Surprises Act applies, and take action. The law is on your side. Use Taven's tools to review your bill, generate dispute letters, and understand exactly what you owe.

You shouldn't have to be a healthcare policy expert to avoid getting overcharged. But until the system gets simpler, being informed is your best defense.