Out-of-Network Insurance Explained: What Patients and Providers Should Know
An out-of-network (OON) provider does not have a contracted rate with a patient’s health plan. That distinction affects what the plan may pay, what the provider can charge, and what the patient may owe, but none of those amounts is fixed in advance. They depend on the plan’s benefit design, the type of service, where care is delivered, and applicable federal and state law.
This article explains what out of network insurance (OON) means, how it differs from having no coverage at all, and what both patients and providers should verify before care begins.
What Is Out-of-Network Insurance?
Out-of-network insurance refers to health-plan benefits used when a patient receives care from a provider who does not have a contract with that plan. Depending on the plan and the service, the insurer may pay part of the charge, pay nothing, or apply different deductibles and cost-sharing than it would for in-network care.
Four situations are commonly confused:
- In-network provider: Has a contracted rate with the plan. The plan pays according to the contract and the patient owes the applicable in-network cost-sharing.
- Out-of-network provider: No contract with the plan. The plan may have OON benefits that pay a portion of the charge, or it may not, depending on the plan design.
- No insurance coverage: Different from OON. An uninsured patient has no plan at all. An OON patient has a plan that may or may not cover the service from that provider.
- A plan with OON benefits vs a plan without: Some plans, including most HMOs, do not cover non-emergency OON care at all. Others, such as PPOs, include OON benefits subject to different deductibles, coinsurance, and allowed amounts. The patient’s plan documents determine which applies.
How Out-of-Network Health Insurance Usually Works
When a patient sees an OON provider, the general sequence is: the practice charges for the service; the patient’s plan processes the claim (if submitted) according to its OON benefit terms; the plan issues an explanation of benefits (EOB) showing what it paid, what was adjusted, and what the patient may owe. The EOB is not a bill, it is the plan’s record of how it processed the claim.
Key variables that affect the outcome: whether the plan has OON benefits for this service type; the plan’s OON deductible and coinsurance; the allowed amount the plan assigns to the service (which may be less than the provider’s charge); whether the provider or the patient submits the claim; and whether assignment of benefits applies.
Verifying coverage before a service, not at check-in, reduces surprises for both the patient and the practice. The eligibility and benefits verification workflow that supports this is covered in the eligibility guide.
Out-of-Network Does Not Always Mean the Same Patient Cost
The patient’s cost exposure depends on the specific plan and situation. This table shows how each scenario can differ.
| Situation | What may change |
| Plan has OON benefits | Deductible, coinsurance, allowed amount, and claim-submission process may differ from in-network terms |
| Plan has no OON benefits | The plan may not pay for non-emergency OON care, subject to applicable protections and exceptions |
| Emergency care or specified facility-based care | Federal or state surprise-billing protections may apply, see the No Surprises Act section below |
| Network exception or prior approval | The plan may apply special rules; verify terms in writing before the service is delivered |
What the No Surprises Act Means for OON Billing
The federal No Surprises Act (NSA), effective January 1, 2022, provides protections against unexpected OON bills in specific situations.¹ These include most emergency services from OON providers or OON emergency facilities, certain non-emergency services from OON providers at in-network hospitals and ambulatory surgical centers, and air-ambulance services.¹ In these covered situations, the law generally limits the patient’s cost-sharing to in-network amounts and prohibits providers from balance billing for the difference.²
The NSA does not apply to every OON billing situation. It does not cover non-emergency services delivered at OON facilities, ground ambulance services, or care covered by Medicare, Medicaid, TRICARE, Veterans Affairs, or CHIP. State surprise-billing laws may provide additional protections in some markets, but these vary. Providers and facilities must follow applicable notice-and-consent requirements where relevant under the NSA.²
What Patients Should Ask Before Receiving OON Care
- Is this provider in my plan’s network for this service type?
- Does my plan include OON benefits for this service?
- What deductible and coinsurance apply for OON care?
- Is prior authorization, a referral, or a network exception required?
- Will the provider submit the claim, or do I need to submit it myself?
- What estimate can the practice provide, and what could change after insurance processes the claim?
What Providers Should Explain Clearly
Practices seeing OON patients should verify coverage and network status before the visit, and treat eligibility data as preliminary, not a guarantee of payment. Setting clear financial expectations early reduces disputes later. Patient-friendly billing statements that show how balances were calculated help patients understand what they owe and why.
- Confirm network status and OON benefit terms before scheduling where possible.
- Communicate an estimated, not guaranteed, patient responsibility before the visit.
- Give patients clear information about claim submission, statement timelines, and what to ask their plan.
- Keep communication consistent across scheduling, front desk, clinical, and billing teams.
The approach to collecting patient balances without damaging the doctor-patient relationship is covered in the patient collections guide.
When Out of Network Billing Needs Extra Review
Some OON situations carry more complexity and compliance risk than routine cases: emergency care and post-stabilization services; non-emergency services delivered at in-network facilities by OON providers; markets where state law adds protections or obligations beyond the NSA; specialties with frequent OON encounters such as anesthesiology, radiology, and pathology; and any situation where a patient has received a conflicting estimate, a network-exception approval, or a disputed coverage determination. In these cases, review the applicable payor policy, state requirements, and legal obligations before billing, not after a dispute arises.
How A3 Medical Billing Can Help
Working through the out of network insurance billing accurately requires strong eligibility verification, clear patient communication, and clean claim submission. A3 Medical Billing provides medical billing services and out-of-network billing support for independent practices, including eligibility verification, patient financial communication, and OON claim workflows built to reduce surprises for both patients and providers. Contact A3 to find out how your practice handles OON patient encounters today.
Frequently Asked Questions
It depends on the plan. Plans with OON benefits, such as PPOs, may pay a portion of the OON charge, subject to a separate OON deductible and coinsurance. Plans without OON benefits may not pay for non-emergency OON care. Federal surprise-billing protections apply in specific situations, including emergency services and certain non-emergency care at in-network facilities.
In-network providers have contracted rates with the health plan. The plan pays according to the contract, and the patient owes the applicable in-network cost-sharing. Out-of-network providers have no such contract. The plan may apply different, or no, benefits, the allowed amount may differ, and the patient may owe more.
Not necessarily. A patient can have active insurance and still be out-of-network with a specific provider. Whether the plan covers any portion of the OON service depends on the plan’s benefit design. Out-of-network and uninsured are not the same thing.
Balance billing occurs when an OON provider bills a patient for the difference between the provider’s charge and the amount the health plan paid.³ For example, if a provider charges $500, the plan pays $200, and the provider bills the patient for the remaining $300, that is a balance bill. Federal and state laws restrict balance billing in certain situations, including emergency care and specified non-emergency services at in-network facilities under the No Surprises Act.¹
- Centers for Medicare and Medicaid Services, No Surprise Billing. Centers for Medicare and Medicaid Services, 2022. Accessed September 2026.
- Centers for Medicare and Medicaid Services, Provider Requirements and Resources. Centers for Medicare and Medicaid Services, 2022. Accessed September 2026.
- National Association of Insurance Commissioners, What Is Balance Billing?. National Association of Insurance Commissioners. Accessed September 2026.
