Health Insurance

Balance Billing

Balance billing can result in unexpected medical bills, particularly when receiving care from out-of-network providers or facilities.

Last reviewed: May 2026 · Editorial methodology

Definition

Balance billing occurs when a healthcare provider charges a patient the difference between their billed amount and the payment received from the insurer. For example, if a surgeon charges $5,000, the insurer pays $2,000 based on its UCR rate, and the provider's contracted agreement would have written off the rest — but the provider is out-of-network, they may bill the patient the remaining $3,000. The No Surprises Act, which became effective January 1, 2022, and whose enforcement mechanisms were strengthened through 2026 rulemaking, prohibits surprise balance billing in emergency settings and for certain non-emergency services at in-network facilities provided by out-of-network ancillary providers such as anesthesiologists and radiologists. In those protected situations, patient cost-sharing is limited to the in-network rate. Balance billing protections do not apply to all out-of-network scenarios — particularly scheduled services at out-of-network facilities that you chose voluntarily. Some states provide additional balance billing protections beyond federal law.

Where this term matters

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Tip

Glossary definitions are educational. Always check your own policy language — insurers can define common terms differently from one another. When in doubt, request a written explanation from your agent.

Related terms

No Surprises ActThe No Surprises Act limits what patients can be billed when they unknowingly receive care from out-of-network providers in emergency or in-network facility settings.Out-of-Network ProviderUsing an out-of-network provider typically triggers higher cost-sharing, a separate deductible, or no coverage depending on your plan type.In-Network ProviderSeeing an in-network provider activates your plan's cost-sharing benefits and typically results in the lowest out-of-pocket costs.NetworkA plan's network determines which providers you can see at the lowest cost-sharing, and using out-of-network providers can dramatically increase your expenses.EOB (Explanation of Benefits)An EOB is not a bill — it is an informational document that breaks down how your insurer processed a claim and what portion remains your responsibility.

Related guides

Source: Cover Forge USA editorial team|Last verified: May 2026|Methodology
Definitions are educational and may be simplified. Always refer to your policy contract and consult a licensed agent for terms that affect coverage decisions.
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Cover Forge USA Editorial Team

Editorial Lead

This article was researched and written by the Cover Forge USA editorial team against federal sources (NAIC, CMS, FEMA, DOL, SSA, state DOIs) and standard policy forms. Bylines organize content by topic — they do not assert individual licensure. See our editorial-policy for details.

Reviewed June 2026

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