Short answer: The No Surprises Act (effective for plan years on or after January 1, 2022) protects you from many surprise out-of-network bills (emergency care, and out-of-network clinicians who treat you at an in-network facility) by limiting your cost to in-network amounts and routing the payment dispute to arbitration. It does not eliminate every out-of-network charge.
The No Surprises Act, part of the Consolidated Appropriations Act, 2021, took effect for plan years beginning on or after January 1, 2022. It targets “surprise” bills: situations where you did everything right but still got hit with an out-of-network charge.
Core protections: for most emergency services, and for out-of-network providers (such as anesthesiologists, radiologists, or pathologists) who treat you at an in-network facility, your cost-sharing is limited to your normal in-network amount, and the provider generally cannot balance bill you for the rest.
How the bill gets resolved: the law takes you out of the middle. The provider and the plan settle the remaining payment dispute through an independent dispute resolution (IDR) arbitration process.
What it does NOT do: it doesn’t eliminate all out-of-network charges, guarantee zero cost, apply in every situation (for example, ground ambulances are largely excluded), or fix ordinary billing errors. If you knowingly choose an out-of-network provider for non-emergency care after getting proper notice and consent, the protections may not apply.