No Surprises Act dispute letter generator
A No Surprises Act dispute letter challenges balance bills when emergency care or certain non-emergency care at an in-network facility involved an out-of-network clinician. Federal rules under 45 CFR Part 149 generally limit you to in-network cost-sharing and bar most surprise balance bills for protected services. Send a written dispute to the billing office with your EOB, cite the NSA, and ask that charges above in-network cost-sharing be withdrawn.
Loading generator…
Practical guide
How to dispute a surprise ER or out-of-network facility bill
Who this is for
- People billed extra after an ER visit at an in-network hospital
- Patients billed by an out-of-network anesthesiologist, radiologist, or hospitalist in a network facility
- Air ambulance surprise bills, since the NSA covers air ambulance balance billing
- Members whose plan processed emergency care at out-of-network rates on the EOB
- Elective out-of-network care you chose with a valid notice-and-consent form is often not protected
- State surprise-billing laws may add protections; they do not replace checking whether NSA applies
What to do
Step 1: Compare the bill to the EOB
Your in-network deductible, copay, and coinsurance should match the EOB for protected services. A provider bill for the remainder is the typical surprise balance bill. Note the claim number, allowed amount, and what you already paid.
Step 2: Check NSA coverage facts
Emergency services and many post-stabilization services are protected. Non-emergency OON care at an in-network facility is protected unless you gave, and were allowed to give, informed consent to waive protections under 45 CFR 149.120.
Step 3: Dispute in writing
Tell the provider you believe the charge violates the No Surprises Act, request an in-network cost-sharing-only bill, and include member ID, date of service, and claim number. A dated dispute letter starts your paper trail.
Step 4: Copy the plan and keep the paper trail
Plans also have NSA duties. Send a copy to your insurer if cost-sharing looks wrong on the EOB. If collections start, dispute the debt in writing and keep certified-mail receipts.
Step 5: Appeal with the health plan if cost-sharing is wrong
If the plan treated emergency care as non-emergency or applied out-of-network rates, file a plan appeal using the deadline on the EOB. The provider dispute and the plan appeal are separate tracks that can run together.
Step 6: Use the CMS help desk if the bill continues
CMS No Surprises Help Desk: 1-800-985-3059. File a complaint at cms.gov/nosurprises. Independent Dispute Resolution is mainly a provider-payer process; consumers still use complaints and plan appeals for cost-sharing errors.
Documents to gather
- Itemized provider bill
- Explanation of Benefits
- ER or facility records showing emergency or in-network facility
- Any Notice and Consent form you were given, or a statement that you were not
- Proof of payment already made toward in-network cost-sharing
- Health plan ID card and member ID
NSA consumer disputes are not the same as a 180-day ERISA claim appeal. Act quickly before collections. Plan cost-sharing errors still follow the appeal deadline on the EOB.
Weak vs strong wording
Weak
This bill is unfair. I had an emergency.
Stronger
Date of service [date] was emergency care at in-network [facility]. Out-of-network [specialty] balance bill of $[x] exceeds in-network cost-sharing on EOB [claim #]. Request withdrawal of balance billing under 45 CFR 149.110.
Name the facility network status, the protected service type, and the EOB numbers.
Weak
I should not have to pay the anesthesiologist because the hospital was in network.
Stronger
Surgery at in-network [facility] on [date]. Anesthesiologist billed $[x] above in-network cost-sharing of $[y] per EOB [claim #]. Service qualifies as non-emergency care by an OON specialist at an in-network facility without valid consent. Request revised bill limited to in-network cost-sharing.
Facility-based OON specialist bills are a core NSA use case when consent was not valid.
Weak
Please remove this air ambulance charge.
Stronger
Air ambulance transport on [date] from [origin] to [destination] for [emergency indication]. Billed amount $[x]; member responsibility should be limited to in-network cost-sharing per EOB. Cite NSA air ambulance protections under 45 CFR Part 149 and request withdrawal of balance bill.
Air ambulance is federally protected; ground ambulance is mostly outside the NSA and needs a different argument.
Mistakes to avoid
- Paying the balance to make it go away without a written reservation of rights
- Assuming all ambulance bills are covered by the NSA. Ground ambulance generally is not federally protected.
- Ignoring a signed consent form that may have waived protections for a scheduled OON provider
- Only disputing with the provider when the EOB shows wrong cost-sharing and a plan appeal is also needed
Authoritative sources
- CMS No Surprises Act overview
- 45 CFR Part 149 — surprise billing
- CMS: No Surprises Act consumer protections
Related AppealFlow pages
- ER surprise bill dispute guide
- What balance billing is
- ER doctor separate bill guide
- Medical necessity appeal generator
- UnitedHealthcare appeal guide
FAQs
How do I write a No Surprises Act dispute letter?
State that you believe the bill violates the NSA, name the date of service, facility, and claim number, and compare the provider bill to your EOB in-network cost-sharing. Ask for withdrawal of amounts above that cost-sharing and cite 45 CFR Part 149. Send copies to the billing office and your plan.
Does the No Surprises Act apply to my ER visit?
Usually yes for emergency services, including when the ER doctor is out of network at an in-network hospital. You still owe in-network cost-sharing. Confirm with the EOB and the facility's network status.
What is the prudent layperson standard?
Emergency coverage is judged by whether a reasonable person would think they needed emergency care based on symptoms, not only the discharge diagnosis. Chest pain that turns out to be reflux can still be an emergency presentation.
How long do I have to dispute a surprise medical bill?
The NSA does not set one federal consumer deadline like ERISA's 180-day appeal clock. Act before collections start and use the plan appeal deadline on the EOB if cost-sharing is wrong. Keep dated copies of every dispute.
Can they send me to collections?
Providers should not balance-bill protected amounts. If a collector contacts you, dispute in writing, send the NSA dispute, and consider a CMS complaint. Do not ignore notices.
Is air ambulance covered?
The NSA includes air ambulance surprise billing protections. Most ground ambulance bills are outside that federal framework; some states regulate ground ambulance separately.
What if I signed a consent form?
Notice-and-consent waivers are limited. They generally cannot be used for emergency services or for certain ancillary specialists. If you signed under pressure in the ER, say so in the dispute and keep a copy of the form.
Do I still appeal with my insurer?
Yes if the plan processed the claim wrong, for example treated emergency care as non-emergency or applied out-of-network rates. That is a plan appeal. The provider dispute is separate.
Generate your NSA dispute letter with the tool above, send it to the billing office, and keep copies. Call CMS at 1-800-985-3059 if balance billing continues.
Free draft tool · Review with your clinician · Not legal or medical advice · Disclaimer