Independent labs and imaging centers often bill surprise charges even when a patient receives care at an in-network hospital or clinic. These out-of-network pathology and radiology providers send bills weeks after a procedure—sometimes for hundreds or thousands of dollars—because the No Surprises Act's protection has significant gaps. In the first half of 2025, radiology accounted for 361,000 of 1.9 million independent dispute resolution cases filed under the law, up 39% from six months prior. Patients cannot always predict which provider will handle their test, and they rarely know the financial gap exists until the unexpected bill arrives.
Table of Contents
- When Your Lab or Imaging IS Protected
- The "Specimen Collected at the Lab" Loophole
- How Often Surprise Bills Happen and How Much They Cost
- How to Challenge a Surprise Lab or Imaging Bill
- Questions to Ask Before Your Procedure
- Frequently Asked Questions
When Your Lab or Imaging IS Protected
When a lab test or imaging study is ordered during care at an in-network hospital or ambulatory surgical center, the No Surprises Act protects you—even if the pathologist or radiologist is out-of-network. You owe only the in-network cost-sharing amount, which typically includes your copay, coinsurance, or deductible.
The law has protected patients from $500 to $3,000+ facility-based bills by capping what you pay. Your protection exists because the facility (hospital or surgical center) ordered the service, not because you chose the specific provider. The law applies to pathologists who analyze samples during surgery, radiologists who read imaging, and any specialist provider whose work occurs as part of in-network facility care. If you receive a bill beyond your normal cost-sharing for services ordered at an in-network facility, the provider is breaking the law.
The "Specimen Collected at the Lab" Loophole
Labs are exempt from surprise-billing protection if a specimen is collected at the independent laboratory's own location rather than at a participating health facility. If your doctor orders a blood test and you walk into an independent lab to give the sample, you lose protection—the lab can send you a surprise bill weeks later.
This loophole matters because many primary care clinics and urgent care centers partner with independent labs rather than drawing blood in-house. Your clinic may be in-network, and your doctor may believe they are ordering an in-network test, but if you are directed to complete the draw at a separate lab location, that lab is not covered. Good faith estimates add little help here: when a clinic orders labs from an independent out-of-network provider, the clinic's estimate covers only its own costs—the lab's separate charges arrive as a surprise months later.
How Often Surprise Bills Happen and How Much They Cost
Out-of-network radiology and pathology bills dominate patient complaints. Radiologists and pathologists are the most common sources of facility-based surprise bills, and radiology providers have won approximately 88% of independent dispute resolution cases over the past three years, totaling roughly $1.03 billion in awards—a sign that payment disputes between insurers and imaging centers remain common even when providers win.
The frequency tells the real story: CMS received 16,000+ surprise-bill complaints in the first half of 2024 alone, with a significant portion stemming from out-of-network lab charges and inaccurate cost estimates. These numbers suggest the law is working in some cases but failing systematically in others—especially when independent labs and imaging centers operate outside in-network facility walls.
How to Challenge a Surprise Lab or Imaging Bill
If you receive an unexpected bill from a pathologist, radiologist, or independent lab, gather your documents first: your explanation of benefits (EOB) from your insurance, the original bill, and any records showing the service was ordered during in-network facility care. Call your insurance company and ask them to verify whether the provider was in-network at the date of service and whether you should have been protected.
If your insurance confirms protection applied, ask the provider to reduce the bill to your cost-sharing amount. If the provider refuses or your insurance denies coverage incorrectly, file a complaint with your state's Department of Insurance. State governments have primary responsibility for enforcing No Surprises Act rules; the Centers for Medicare and Medicaid Services assumes enforcement only if your state does not act. You can also request independent dispute resolution (IDR), a free arbitration process that forces the provider and insurer to resolve the disagreement—the high win rates for providers suggest IDR works when you have documentation that protection applies.
Questions to Ask Before Your Procedure
Before any lab work or imaging at an in-network facility, ask your doctor or clinic: "Is the lab or imaging center in-network with my plan, or will I have out-of-network providers handling the test?" If they name an independent provider, request a good faith estimate from that provider in writing. Ask whether you can choose an in-network alternative. For procedures at hospitals, explicitly ask which specialists (radiologist, pathologist) will read your results and confirm their network status—surprises are least likely when everyone involved is in your plan.
Frequently Asked Questions
If I get a surprise bill from a lab that an in-network clinic ordered, do I have to pay it?
No—if the specimen was collected at the in-network clinic, you owe only your normal cost-sharing amount. If it was collected at the independent lab itself, the lab may legally send you the full bill. Verify where the collection happened on your invoice.
How long does it take to resolve a surprise bill dispute?
Insurance appeals typically take 30–90 days. Independent dispute resolution (IDR) can take 30–60 days after both parties submit documents. File promptly—late complaints may be denied.
Can a good faith estimate protect me from a surprise lab bill?
Only if the lab itself provides it. A clinic's estimate does not cover charges from a separate independent lab, so ask the lab directly for its estimate before giving your sample.
What if my state doesn't enforce the No Surprises Act?
You can file a complaint with the Centers for Medicare and Medicaid Services (CMS), which has authority if a state fails to act. CMS can investigate and enforce against the provider.