What Is Balance Billing and How to Fight It

You went to an in-network hospital, had surgery with a surgeon your insurance approved, and thought you did everything right. Then a bill arrives from the anesthesiologist — an out-of-network provider you never chose, never met before surgery, and certainly never agreed to pay out-of-network rates. They're billing you $4,500 beyond what your insurance covered.

That's balance billing, and in many cases, it's now illegal.

This guide explains what balance billing is, when federal and state laws protect you, and exactly what to do if you receive a surprise out-of-network medical bill.

What Is Balance Billing?

Balance billing happens when a healthcare provider bills you for the difference ("balance") between their full charge and the amount your insurance company paid.

Here's a concrete example:

Without balance billing protections, you'd owe $4,400 — the $400 coinsurance (which is your normal cost-sharing) plus the $4,000 balance the provider charges beyond what insurance covered. With protections, you'd owe only the $400 coinsurance.

Why Does Balance Billing Happen?

Balance billing typically occurs because:

• Out-of-network providers at in-network facilities. You choose an in-network hospital, but the anesthesiologist, radiologist, pathologist, or assistant surgeon working there is out-of-network. You had no way to know or choose differently.
• Emergency room visits. In an emergency, you don't pick your hospital based on network status, and the ER doctors may be out-of-network even at an in-network hospital.
• Out-of-network facilities. You knowingly or unknowingly use an out-of-network facility, and the provider bills the full difference.

The No Surprises Act: Federal Protection

The No Surprises Act (NSA), effective January 1, 2022, provides the most comprehensive federal protection against balance billing. Here's what it covers:

Protected Situations

1. Emergency Services (Any Facility)

All emergency services are protected, regardless of whether the facility or providers are in-network or out-of-network. This includes:

• Emergency room visits
• Emergency stabilization
• Post-stabilization care until you can be safely transferred or discharged

Your cost: You pay only what you'd pay for in-network services (your normal copay, coinsurance, and deductible based on in-network rates). The provider and insurance company work out the rest between themselves.

2. Out-of-Network Providers at In-Network Facilities

If you go to an in-network hospital or surgical center and receive services from an out-of-network provider you didn't choose, you're protected. This commonly applies to:

• Anesthesiologists
• Radiologists
• Pathologists
• Assistant surgeons
• Hospitalists
• Neonatologists
• Any other provider you didn't have a meaningful ability to choose

3. Air Ambulance Services

Out-of-network air ambulance providers cannot balance bill you. (Note: ground ambulance is NOT covered by the No Surprises Act — this is a known gap.)

What the No Surprises Act Does NOT Cover

• Ground ambulances — A significant gap in the law
• Medicare, Medicaid, TRICARE, VA — These programs already have their own balance billing prohibitions
• Services where you gave informed consent — In limited cases, a provider can ask you to waive protections (more on this below)
• Uninsured/self-pay patients — Different protections apply (good faith estimates)

The Consent Waiver Exception

An out-of-network provider can ask you to waive your balance billing protections, but only under strict conditions:

• The service is non-emergency
• The provider gives you written notice at least 72 hours before the service (or at the time of scheduling if less than 72 hours)
• The notice includes a good faith estimate of what you'll be charged
• You voluntarily sign the waiver — it cannot be a condition of receiving care
• The waiver cannot be used for ancillary services (anesthesiology, radiology, pathology, neonatology, assistant surgery, hospitalist, intensivist services) or emergency care

Bottom line: If you didn't sign a specific, detailed waiver that meets all these criteria, the No Surprises Act protects you.

Good Faith Estimates for Uninsured Patients

If you don't have insurance (or choose not to use it), the No Surprises Act gives you separate protections:

• Providers must give you a good faith estimate of expected charges before scheduled services
• If the final bill exceeds the estimate by $400 or more, you can dispute it through an independent review process
• The estimate must include all items and services you can reasonably expect, including from other providers (like the anesthesiologist for a surgery)

State Protections

Many states had balance billing protections before the federal No Surprises Act, and some state laws are stronger than the federal law. Key points:

• The No Surprises Act sets a floor — states can provide more protection but not less
• State laws may cover ground ambulances (which the federal law doesn't)
• Some states have lower thresholds for triggering protections
• State laws apply primarily to state-regulated insurance plans (individual and small-group market plans). Self-funded employer plans are regulated by federal law.

States with notably strong balance billing protections include California, Colorado, Connecticut, Florida, Georgia, Illinois, Maine, Maryland, Michigan, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oregon, Pennsylvania, Texas, Virginia, and Washington. Check your specific state patient rights for details.

How to Fight a Balance Bill: Step by Step

Step 1: Don't Pay the Bill Immediately

This is critical. Once you pay, getting money back is much harder. Review the bill carefully first.

Step 2: Determine If You're Protected

Ask yourself:

• Was this an emergency service? → Protected
• Was this at an in-network facility with an out-of-network provider I didn't choose? → Protected
• Was this an air ambulance from an out-of-network provider? → Protected
• Did I sign a specific waiver meeting all the legal requirements? → Possibly not protected (but verify the waiver was valid)

Step 3: Contact Your Insurance Company

Call the number on your insurance card and explain the situation. Ask them to:

• Confirm whether the provider was in-network or out-of-network
• Confirm whether No Surprises Act protections apply
• Reprocess the claim at in-network rates if protections apply
• Provide documentation of their determination

Step 4: Contact the Provider

Call the provider's billing department and inform them that the bill may violate the No Surprises Act. Be specific:

"I received services at [in-network facility] on [date]. Your provider was out-of-network and I did not sign a valid waiver. Under the No Surprises Act, I'm protected from balance billing for these services. Please adjust this bill to reflect only my in-network cost-sharing obligation."

Step 5: File a Complaint with CMS

If the provider or insurance company doesn't resolve the issue, file a complaint with the Centers for Medicare & Medicaid Services:

• Phone: 1-800-985-3059
• Online: cms.gov/nosurprises

CMS will investigate and can take enforcement action against providers who violate the No Surprises Act.

Step 6: File a State Complaint

Also file with your state insurance department. State regulators can investigate and take action under state balance billing laws, which may provide additional protections.

Step 7: Use the Independent Dispute Resolution Process

If there's a disagreement about what the provider should be paid (not about whether you owe it — the Act keeps you out of that fight), the provider and insurance company can use an Independent Dispute Resolution (IDR) process. This is their fight, not yours. Your cost-sharing should already be set at in-network rates regardless of the IDR outcome.

Step 8: Send a Formal Dispute Letter

If informal resolution doesn't work, send a formal written dispute. Our dispute letter generator can create a No Surprises Act-specific letter for your situation. Include:

• Date of service and provider information
• Explanation of why the No Surprises Act applies
• The amount you believe you owe (in-network cost-sharing only)
• A deadline for response (typically 30 days)
• Notice that you've filed (or will file) complaints with CMS and your state

Real-World Scenarios

Scenario 1: ER Visit with Out-of-Network Doctor

You go to the ER at an in-network hospital. The ER physician is employed by an out-of-network staffing company. You receive a $3,000 bill from the doctor's group.

You're protected. Emergency services are always covered under the No Surprises Act. You owe only your in-network cost-sharing (copay, coinsurance, deductible).

Scenario 2: Surprise Anesthesiologist Bill After Surgery

You schedule surgery at an in-network hospital with an in-network surgeon. The anesthesiologist assigned by the hospital is out-of-network. You get a $5,000 balance bill.

You're protected. Ancillary providers at in-network facilities are covered. You didn't choose the anesthesiologist and couldn't have — they're assigned by the hospital.

Scenario 3: You Chose an Out-of-Network Provider

You deliberately see an out-of-network specialist because they're the best in their field. They bill you $8,000, and your insurance pays $3,000 out-of-network.

You're likely NOT protected. The No Surprises Act doesn't cover situations where you knowingly chose an out-of-network provider. However, you can still negotiate. Use Taven's bill review to check if the charges are reasonable.

Scenario 4: Air Ambulance vs. Ground Ambulance

You're airlifted by an out-of-network helicopter ambulance. → Protected.

You're taken by an out-of-network ground ambulance. → Not protected by the No Surprises Act (but may be protected by state law). This is a known gap that Congress is working to address.

Protecting Yourself Proactively

1. Request a good faith estimate before any scheduled procedure. This forces the provider to estimate all costs, including other providers involved.
2. Ask about all providers involved. Before surgery, ask the hospital: "Will the anesthesiologist, radiologist, pathologist, and assistant surgeon be in-network?" Get it in writing.
3. Don't sign waivers without reading them. If a provider asks you to sign a consent form acknowledging out-of-network charges, understand that you may be waiving your protections. You have the right to refuse.
4. Check network status. Use your insurance company's provider directory to verify network status — but call and confirm directly, as directories are often outdated.
5. Know your state's protections. Check your state patient rights to understand additional protections beyond the federal law.
6. Keep all documents. Save every bill, EOB, correspondence, and note from phone calls (date, time, who you spoke with, what they said).

The Bottom Line

Balance billing was once one of the most frustrating and financially devastating aspects of American healthcare. The No Surprises Act has changed the landscape significantly — if you receive emergency care, or if an out-of-network provider treats you at an in-network facility, you are protected from surprise bills.

But protections don't enforce themselves. You need to know your rights and be willing to push back when a bill crosses the line. Start by reviewing any questionable bill with Taven's bill review tool, check your state-specific protections, and use our dispute letter generator if you need to put your case in writing.

The law is on your side. Use it.