What Is a Good Faith Estimate? How the $400 Rule Lets You Dispute Medical Bills (2026)

The Good Faith Estimate is the No Surprises Act's quietest superpower. If you're uninsured or paying cash for any non-emergency service, the provider is legally required to give you a written, itemized estimate of expected charges before you walk in the door. And if the final bill exceeds that estimate by $400 or more, you can dispute the excess through a federal process — with a third-party reviewer whose decision is binding on the provider. Hardly anyone knows this exists. Here's exactly how to use it.

What a Good Faith Estimate Actually Is

A Good Faith Estimate (GFE) is a written, itemized accounting of every charge you can expect for a scheduled non-emergency service. Required by the No Surprises Act (effective January 1, 2022), it has to include all expected charges — facility fees, physician fees, lab work, anesthesia, imaging, and any other items or services reasonably expected to be part of your care. It's not a ballpark; it's a detailed estimate that creates a real legal right. If the final bill comes in $400 or more over the estimate, you can dispute the excess through the federal Patient-Provider Dispute Resolution (PPDR) process.

The GFE is mandatory, not optional. Federal law requires healthcare providers to furnish one upon request or upon scheduling, in writing or electronically — verbal estimates don't satisfy the requirement. Refusals can be reported to CMS.

Who Qualifies Today (and Who Will Eventually)

The current rule applies to two groups: uninsured patients — anyone without health coverage for the service in question — and self-pay patients, meaning anyone who has insurance but chooses not to use it for a particular service (paying cash for a better price, or to maintain privacy). You can request a GFE even with insurance, as long as you tell the provider you intend to self-pay; this is genuinely useful for comparing the cash price against what your insurance would cover after deductible and coinsurance.

Insured patients using insurance are supposed to receive an "Advanced Explanation of Benefits" (Advanced EOB) from their insurer instead of a GFE — this is a separate provision of the No Surprises Act, and rulemaking for it is still underway as of 2026. In the meantime, if you have insurance and want to use it, you can't demand a GFE from the provider; you can ask the insurer for a coverage estimate.

When the Provider Has to Deliver It

The deadlines depend on when you schedule. If the service is scheduled at least 3 business days in advance, the provider has 1 business day from scheduling to deliver the GFE. If the service is scheduled only 1–2 business days in advance, the provider has 3 business days from scheduling — which can mean the estimate arrives after the service. If you request a GFE without scheduling at all (e.g., shopping prices), the provider has 3 business days from your request. These rules apply to every healthcare provider, facility, or laboratory subject to the law — large hospital systems, solo practices, outpatient surgery centers, imaging centers, and independent labs.

What a Compliant GFE Must Contain

The GFE itself has specific required elements. If yours is missing several, it's not a valid GFE — and you can either request a corrected one or use the missing elements as the basis for a refusal complaint. The required components:

Patient name and date of birth
Description of the primary item or service being scheduled
Itemized list of all expected items and services, including those from co-providers and co-facilities (anesthesia, lab, imaging center, etc.)
Expected charge for each item or service
Name, NPI, and TIN of each provider or facility
Diagnosis codes and CPT/HCPCS service codes (when known)
A list of items or services the GFE does not include
A disclaimer that actual charges may differ
Information about the patient-provider dispute resolution process

It must be delivered in a format you can keep — paper, PDF, email, patient portal. A verbal quote, a sticky note, or a number written on a brochure does not satisfy the law.

How to Actually Request One — Word-for-Word Scripts

Most front-desk staff and schedulers are still unfamiliar with the GFE requirement, so a confident, specific request gets you a lot further than a hesitant one. The opening:

If you're scheduling

"I'd like to request a Good Faith Estimate for my upcoming [procedure/service] as required by the No Surprises Act. I will be paying as a self-pay patient."

If they seem unfamiliar with the term

"Under federal law effective January 2022, all healthcare providers are required to give uninsured or self-pay patients a written Good Faith Estimate of expected charges. This is part of the No Surprises Act. I can provide the CMS reference if helpful."

Follow-up to make sure it's comprehensive

"Please make sure the estimate includes all expected charges from every provider involved — facility fees, anesthesia, lab work, pathology, imaging, and any other services. The law requires a comprehensive itemized estimate."

The follow-up matters because the most common GFE error is omitting co-provider charges (the anesthesiologist and the pathologist work for separate practices and bill separately). A compliant GFE has to include those line items, even though they come from third parties.

The $400 Rule: Your Most Powerful Lever

This is the part hardly anyone uses. If your final bill exceeds the total Good Faith Estimate by $400 or more, you can file a federal Patient-Provider Dispute Resolution (PPDR) dispute. The $400 threshold applies to the bill total, not individual line items — meaning a few small unexpected charges that add up to $400 also qualify. You have 120 calendar days from receiving the bill to file. The dispute is handled by an independent third-party reviewer, not the provider. The filing fee is $25 (waivable for financial hardship, refunded if you win), and the reviewer's decision is binding on the provider — if you win, they have to adjust the bill to the determined amount.

Per CMS data, patients who file PPDR disputes frequently receive favorable outcomes — particularly when the gap between estimate and bill is hard for the provider to justify with documentation.

Filing a PPDR Dispute

The process is more clerical than confrontational. The flow:

Compare line by line. Request an itemized bill if you don't have one. Place it side by side with your GFE and check each service code, description, and charge. Note every item that's new or higher than the estimate.

Calculate the difference. Add up everything on the final bill, subtract the GFE total. If the gap is $400 or more, you're eligible. Even if individual items differ in both directions, the threshold applies to the total.

Gather your documents. You'll need the original GFE (the version you received before the service), the final bill or itemized statement, any correspondence with the provider about charges, and your contact information and date of service.

File at the CMS PPDR portal. Submit through the federal CMS Patient-Provider Dispute Resolution portal. Upload your GFE, the final bill, and a brief explanation of the discrepancy. Pay the $25 filing fee (or request a hardship waiver as part of the submission).

Wait for the decision. An independent reviewer examines the GFE, the final bill, and any supporting documents from both you and the provider. Decisions are typically issued within 30 business days, and they're binding on the provider.

Using the GFE Even When You Can't File a Dispute

The GFE is also a powerful negotiation tool, even when the gap is under $400 or you decide not to file. Three uses come up most often. Price-shopping: request GFEs from multiple providers for the same procedure and compare; our hospital price transparency guide covers how to also pull the publicly disclosed payer-specific rates as a sanity check. Cash-pay leverage: if the GFE total is lower than what your insurance would cost-share, you may save by paying cash and skipping the claim entirely. Post-service negotiation: even when the gap is below the dispute threshold, citing the GFE in a formal appeal gives you documented leverage that's harder for the billing department to dismiss.

The Limits of the GFE

The GFE doesn't cover everything. Emergency services are excluded — they're covered by a different part of the No Surprises Act (see our NSA guide and ER cost guide). Insured patients using their insurance aren't currently entitled to a GFE — they'll eventually get an Advanced Explanation of Benefits from the insurer once rulemaking finishes. Providers can legitimately add charges for services that were genuinely unforeseeable (a complication discovered during surgery, for example), though they have to justify those additions if challenged. And enforcement has been inconsistent in the early years — CMS accepts complaints about providers who refuse to issue GFEs, but follow-through has been uneven.

States with Stronger Protections Than the Federal GFE

A handful of states have gone further than the federal floor. California requires estimates for both insured and uninsured patients and imposes penalties on providers who bill significantly more than the estimate. Colorado mandates upfront cost disclosures for insured patients at scheduling. New York has comprehensive surprise-billing protections that include estimate requirements covering both insured and uninsured patients. Maine and New Hampshire require cost estimates regardless of insurance status. If your state has a stronger rule, it applies on top of the federal protection — your state insurance department can confirm.

If a Provider Refuses to Give You a GFE

Refusal is a violation of federal law, but it happens, and the response sequence is: (1) cite the rule directly — 45 CFR Part 149, Subpart G requires GFEs for uninsured and self-pay patients; (2) put the request in writing (email is sufficient) so you have a paper trail; (3) file a complaint with CMS at the No Surprises Help Desk (1-800-985-3059, 8 a.m.–8 p.m. ET, seven days a week, or online); and (4) escalate to your state attorney general's consumer-protection office, which can also investigate. Most refusals resolve at step 1 once the staff person realizes you know the rule.

Frequently Asked Questions

Can I get a Good Faith Estimate if I have insurance?

Yes — but only if you tell the provider you plan to self-pay (not use your insurance) for that service. If you plan to use insurance, the provider isn't currently required to give you a GFE, though future rulemaking is expected to extend coverage. The CFPB's GFE explainer covers how this interacts with insurance.

What if the provider refuses to give me one?

Document the refusal (date, person you spoke with, what was said), then file a complaint with CMS at 1-800-985-3059 or online. You can also report the provider to your state attorney general's consumer-protection division.

Can I use the GFE to negotiate a lower price?

Absolutely. Request GFEs from multiple providers for the same procedure to compare prices, or use a single GFE as a baseline for negotiation — if the final bill is higher than the estimate, even by less than $400, the GFE gives you documented leverage to push back.

Does the GFE requirement cover prescription drugs?

It applies to healthcare services and items provided by healthcare providers and facilities. Prescription drugs dispensed by a pharmacy are generally not covered. But drugs administered as part of a medical service (e.g., during a procedure) should be included in the procedure's estimate.

What if my bill is just under $400 over the GFE?

You can't use the PPDR process for differences under $400, but you can still appeal the bill directly with the provider, citing the GFE as evidence the charges exceed what you were told to expect.

The Bottom Line

The Good Faith Estimate is the rare consumer protection that actually works for the patient — federal, mandatory, with a binding dispute mechanism behind it — and it's vastly underutilized. If you're uninsured or paying cash for any scheduled non-emergency service, request the GFE in writing before you commit, save the document, compare the final bill against it line by line, and file a PPDR dispute within 120 days if the gap is $400 or more. The provider has to participate. The system is built so you can win.

Before any scheduled medical service

Request a Good Faith Estimate at the time of scheduling — use the script above
Review the GFE carefully — make sure it includes all expected providers and services
Compare prices — get GFEs from multiple providers for the same procedure
Save the GFE — keep the original document; you'll need it if you file a dispute
After the service, compare the final bill to the GFE line by line
If the bill exceeds the GFE by $400 or more, file a PPDR dispute within 120 days

Health Bill Central can analyze your bill against your Good Faith Estimate to flag charges that qualify for a PPDR dispute, generate the dispute letters, and check whether you also qualify for charity care or other financial assistance programs. Don't pay more than you were told to expect.

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Content is for informational purposes only and does not constitute financial, legal, or medical advice. Consult a qualified professional for advice specific to your situation.