In-Network vs Out-of-Network

One of the most consequential decisions in US health insurance is whether the providers and facilities you use are in your plan’s network. The difference between in-network and out-of-network care can be enormous — the same procedure at the same hospital can result in vastly different bills depending on whether your insurer has a contract with that hospital. Understanding how networks work is fundamental to using your coverage effectively and avoiding unexpected costs.

How provider networks are created

An insurance plan’s network is the set of providers, hospitals, and facilities that have signed contracts with the insurer. These contracts establish negotiated rates — the amounts the insurer and provider have agreed the insurer will pay for specific services. These negotiated rates are almost always lower than what the provider would charge without a contract.

Providers join networks for business reasons: being in-network means they receive patient referrals and reliable payment. Insurers assemble networks to offer enrollees a range of providers while managing costs. The result is that every major insurer maintains multiple distinct networks, and being in-network with one insurer or one plan does not mean a provider is in-network with another.

Networks vary in size. Some are broad, including most providers in a region. Others are narrow, including only selected hospitals and physician groups — often in exchange for lower premiums. A narrow network plan can be a good value if the in-network providers meet your needs, but it significantly limits your flexibility.

How plan type determines network rules

Different plan types impose different network rules on enrollees:

HMO (Health Maintenance Organization): Coverage is restricted to in-network providers except in true medical emergencies. HMOs require enrollees to choose a primary care physician (PCP) who coordinates all care and provides referrals to in-network specialists. Using an out-of-network provider voluntarily under an HMO typically results in no coverage — you pay the entire bill.

PPO (Preferred Provider Organization): Allows out-of-network access, but at significantly higher cost. Out-of-network care is subject to a separate (and higher) deductible and a higher coinsurance percentage. Referrals to specialists are not required. PPOs offer more flexibility but often cost more in premiums.

EPO (Exclusive Provider Organization): Combines the network restriction of an HMO with the referral-free access of a PPO. You must use in-network providers, but you do not need referrals within the network. Out-of-network care (except emergencies) is not covered.

HDHP (High-Deductible Health Plan): May be structured as an HMO, PPO, or other type. The defining feature is the high deductible, not the network rules. Network rules depend on the underlying plan structure.

Verifying a provider is in your network

Never assume a provider is in your network based on:

• The insurer’s general reputation or brand
• Being told by a friend or coworker who has a different plan
• A previous year’s directory

Always verify before scheduling care. Use your insurer’s current online provider directory — accessible through your member account. Enter the provider’s name, NPI (National Provider Identifier) if known, and your specific plan name. If the directory shows the provider as in-network, save or screenshot that result.

Even more reliably, call the provider’s office and specifically ask: “Do you accept [plan name] through [insurer name]?” Request the plan-specific answer, not just “yes we take Blue Cross” — a provider may be in-network for some Blue Cross plans and out-of-network for others.

What out-of-network care actually costs

When you see an out-of-network provider under a plan that does cover out-of-network services (such as a PPO), cost-sharing is applied differently. There is typically a separate out-of-network deductible — often higher than the in-network one. After meeting it, your coinsurance percentage is higher. Out-of-network spending may have a separate out-of-pocket maximum, or there may be no out-of-network out-of-pocket maximum at all, meaning your potential costs are uncapped.

Additionally, out-of-network providers can engage in balance billing: charging you the difference between what they billed and what your insurer paid (which may be based on a lower benchmark rather than a negotiated rate). The result can be a large bill even after insurance has paid its share.

The No Surprises Act, which took effect in 2022, limits balance billing in specific circumstances — primarily when you receive out-of-network care at an in-network facility during an emergency, or when an out-of-network provider participates in a service at an in-network facility without your knowledge. Outside those situations, balance billing by out-of-network providers remains possible.

Comparing in-network and out-of-network costs

The table below compares how costs are applied depending on whether you use an in-network provider, an out-of-network provider under a PPO, or an out-of-network provider under an HMO or EPO. Actual percentages vary by plan.

Cost element	In-network	Out-of-network under PPO	Out-of-network under HMO or EPO
Deductible	In-network deductible applies (typically lower)	Separate, higher out-of-network deductible	Generally not applicable — no coverage
Coinsurance	Lower (e.g., 10–20% of allowed amount)	Higher (e.g., 30–50% of a benchmark rate)	Full provider charge — insurer pays nothing
Balance billing risk	Not permitted for contracted services	Possible; can be significant	Full provider charge applies
Counts toward in-network OOP maximum	Yes	Only if plan has a combined OOP max	No
Referral required	Depends on plan type (HMO: yes; PPO/EPO: no)	Not applicable in most situations	Only for in-network use (HMO)

What this looks like in practice

Imagine James, who has a PPO plan. He schedules a consultation with a specialist who appears in his insurer’s online provider directory. He does not call the provider’s office to confirm participation. The appointment proceeds normally.

A week later, James receives an Explanation of Benefits showing the specialist’s services processed at out-of-network rates. The provider had left the network earlier in the year, and the directory had not been updated. Because James has a PPO, the visit is covered — but at the higher out-of-network cost-sharing. His out-of-network deductible applies separately from his in-network deductible, which he had already partially met. His coinsurance is 40% instead of 20%, and it is applied to a benchmark rate rather than a negotiated rate. He also receives a balance bill from the specialist for the difference between the specialist’s full charge and the insurer’s payment.

The total bill is several hundred dollars more than he would have paid at an in-network specialist for the same consultation. Had James called the provider’s office before the appointment to confirm plan-specific participation, he could have identified this problem in advance and either found a confirmed in-network specialist or requested a continuity-of-care provision through his insurer.

Step by step: verifying a provider before your visit

1. Log into your insurer’s member portal and navigate to the Find a Provider or Provider Directory section.
2. Search by provider name, specialty, or NPI (National Provider Identifier). Select your exact plan name — not just the insurer — because network participation is plan-specific.
3. Note the result showing in-network status. Save or screenshot the directory result with the date and your plan name visible, in case a dispute arises later.
4. Call the provider’s office directly. Ask: “Do you accept [full plan name] through [insurer name] for [your specific employer group or marketplace plan]?” Request a plan-specific confirmation, not just general insurer acceptance.
5. If the provider is associated with a hospital or facility — for example, a surgeon who operates at a specific hospital — separately verify that the facility is in-network and that any ancillary providers (anesthesiologists, assistants) likely to be involved accept your plan.
6. If the provider you need is not in-network, contact your insurer’s member services and ask about out-of-network exceptions, continuity-of-care provisions, or referral to an in-network equivalent.
7. After the visit, log into your member portal and review the EOB when it posts. Confirm the claim was processed at in-network rates. If it was processed at out-of-network rates incorrectly, file an appeal promptly — most plans have short timelines for appeals.

Documents and terms you will see

When navigating network rules, you will encounter the following terms in your plan documents and billing statements.

• In-network — a provider who has a contract with your insurer and accepts negotiated rates for covered services
• Out-of-network — a provider without a contract with your insurer; cost-sharing is higher and coverage may not apply
• Network — the full set of providers, hospitals, and facilities contracted with your insurer under a specific plan
• Balance billing — when an out-of-network provider bills you for the gap between their charge and what the insurer paid
• Surprise billing — an unexpected out-of-network bill that occurs when you receive care at an in-network facility but from a provider who is out-of-network
• Allowed amount — the negotiated rate that is the basis for cost-sharing calculations when you use an in-network provider