Where it came from
The No Surprises Act was enacted as Title I of Division BB of the Consolidated Appropriations Act, 2021 (Public Law 116-260), signed 2020-12-27. Most patient protections took effect 2022-01-01. Subtitle A covers patient protections and the Federal IDR process; Subtitle B covers information for patients (good-faith estimates); Subtitle C is the air-ambulance layer; Subtitle D contains other provisions.
What it protects
The federal protection applies in three patient-facing situations:
- Emergency services. If you receive emergency care at an out-of-network facility or from an out-of-network provider, you cannot be charged more than the in-network cost-share.
- Out-of-network ancillary providers at in-network facilities. Anesthesiology, radiology, pathology, neonatology, ED-treating physicians, hospitalists, intensivists, and lab services billed by an OON provider at an INN facility are protected — even if you signed a generic consent form. The notice-and-consent waiver under PHSA §2799B-2 does NOT cover these specialties.
- Air ambulance. OON air-ambulance services are covered by NSA. Federal preemption under the Airline Deregulation Act prevents states from regulating air-ambulance rates.
What it does NOT cover
Three important exclusions:
- Ground ambulance. The federal NSA explicitly excludes ground ambulance. Approximately 10-15 states have their own ground-ambulance balance-billing laws (NY, CO, MD, ME, VT, others). See the 50-state matrix.
- Medicare, Medicaid, TRICARE, VA. The NSA applies to commercial group health plans and individual market insurance — not federal beneficiary programs. Each program has its own beneficiary-protection rules.
- Properly-executed notice-and-consent waivers. For scheduled OON non-emergency services at an INN facility, the provider can give you a compliant notice-and-consent form at least 72 hours in advance. If you sign it, NSA protection is waived for that visit (with the ancillary-services exception above).
The CMS-administered consumer complaint pathway. Free, federal, and the recommended first action for any balance-billed insured patient. You have 90 calendar days from when you knew or should have known of the NSA violation to file.
How disputes get resolved
There are two distinct dispute pathways under NSA, governed by 45 CFR Part 149:
- Federal IDR (Subpart E). Provider and plan have a 30-business-day open-negotiation period from the EOB. If they can't agree, the provider has 4 business days to initiate arbitration through a certified IDR entity at nsa-idr.cms.gov. Patients do not file Federal IDR themselves.
- PPDR (Subpart F). Uninsured or self-pay patients whose actual bill exceeds their good-faith estimate by $400+ can file a Patient-Provider Dispute Resolution within 120 calendar days. The $25 administrative fee is paid by the patient at filing.
The patient's role
For insured patients, the most important action is filing an NSA complaint with the CMS No Surprises Help Desk at 1-800-985-3059. This is free, federal, and triggers enforcement review. The 90-calendar-day complaint window runs from the date you knew or should have known of the violation.
For uninsured/self-pay patients, the PPDR pathway is the primary patient-side action. Use the decoder to route to the correct pathway for your situation.
Related healthcare resources
Informational, not medical, legal, or insurance advice. Consult a healthcare-billing attorney or patient-advocate before acting on a No Surprises Act dispute. The free CMS NSA complaint pathway is 1-800-985-3059.