Explanation of Benefits: How to Review a Medical Claim

An explanation of benefits, or EOB, shows how your health insurer processed a claim for care you received. Reviewing it alongside the provider's bill can help you spot a discrepancy before you pay.

The figures can be confusing, especially when your plan has a deductible or coinsurance. Keep both documents together so you can compare the same service and resolve questions with the right company.

Key takeaways

• Your insurer sends an EOB after processing a claim. Your provider sends a separate bill when it requests payment.
• A deductible, copay, coinsurance, and network rules can all affect what you pay for care.
• If the documents don't match, contact the insurer or provider before paying the disputed amount.

What to look for on an explanation of benefits

An EOB identifies the patient, provider, service date, and claim. It may also include a claim number, service descriptions, remarks, and information about the insurer's decision.

Look for the figures labeled amount billed, allowed amount, insurer payment, and patient responsibility. Insurers use different layouts and may choose slightly different terms, so the remarks and definitions on the statement can help you understand its entries.

An EOB can contain several service lines for one visit. You may also receive separate statements for services associated with the same appointment, such as a facility visit and laboratory work. Keep the pages together rather than assuming each document covers the entire visit.

If you have family coverage, pay attention to the patient name as well. An insurer may send statements for more than one covered family member, and the account holder's name may appear on several documents.

How health insurance cost sharing works

Your health insurance plan's cost-sharing rules help explain why receiving covered care can still leave you with a bill. The plan documents describe which rules apply to different services.

Deductibles and copays

A deductible is the amount you pay for covered services before your plan begins sharing costs for services subject to that deductible. Some benefits may apply before you meet it, so a deductible doesn't always control every visit.

A copay is a fixed amount you pay for a covered service under your plan's rules. Copays may apply to office visits, prescriptions, or other services. Your plan determines when a copay applies and how it counts toward your deductible and out-of-pocket maximum.

Coinsurance

Coinsurance is the percentage of a covered cost you pay, often after you've met the applicable deductible. A plan may describe its arrangement as an 80/20 split, with the insurer and member each paying a share under the plan's terms.

Different services can have different cost-sharing rules. For example, an office visit may have a copay while other care is subject to a deductible and coinsurance. The Summary of Benefits and Coverage can help you find the terms that apply to your plan.

What your out-of-pocket maximum means

Your out-of-pocket maximum is a limit on what you pay for covered services under your plan's applicable rules during a plan year. Once you reach the in-network maximum, the plan generally pays 100% of covered in-network costs for the rest of that period.

The limit doesn't include everything you spend on health care. Monthly premiums don't count, and charges for services your plan doesn't cover generally don't count either. Out-of-network spending may have a separate limit or may not count toward the in-network maximum.

HealthCare.gov explains the out-of-pocket maximum and the costs excluded from it. Keep your plan's individual and family limits in mind when reviewing statements for more than one covered person.

Why your provider's network matters

The same kind of care can leave you with different costs depending on your plan and the provider you use. Your EOB gives you a chance to see how the insurer handled the claim under your coverage.

PPO and HMO plans

A PPO generally offers more flexibility to use providers outside its network, although the member's costs can be higher. An HMO typically has a more limited network and may require a primary care referral for specialist care.

The rules vary by plan and service. Our guide to health insurance networks explains how these plan types approach access to care.

Separate providers at one visit

A hospital, physician, laboratory, or other provider may submit a separate claim for its part of your care. Those providers don't necessarily participate in the same network.

That means a single appointment can generate multiple EOBs and bills. If one statement doesn't look like the others, use the provider name and service date to identify which part of the visit it concerns. Out-of-network care can also carry a risk of balance billing, depending on the circumstances and applicable protections.

Compare your EOB with the provider's bill

Once you have both documents, place them side by side. A provider's statement may cover more than one date of service, while an EOB may relate to one claim or only part of a visit.

Match the service details first

Start with the patient's name, the provider, and the date of care. Then look at the service descriptions and any claim or account numbers that help connect the documents.

A bill with several entries may need to be compared with several EOBs. Likewise, one EOB may list several services. If you can't match an entry, ask the provider for an itemized bill that separates the charges.

Account for payments you already made

Look for a copay or other payment you made at the appointment and any payments made afterward. Keep receipts and statements until the account is resolved.

If a payment doesn't appear on the provider's bill, contact the billing office and give them the payment date and amount. A missing payment and an insurance claim issue are different problems, so identifying which document needs attention can save time.

What to do when the documents don't match

A difference between the EOB and the bill deserves an explanation before you pay the disputed amount. Gather the EOB, the bill, and any payment receipts so you can refer to the same dates and numbers during the conversation.

Start with the insurer for claim questions

Call the number on your insurance card when you need help understanding the insurer's decision or the entries on the EOB. Have your member ID and claim number available, and identify the service date.

Ask the representative to explain the part you don't understand in plain language. Write down the representative's name, the date, and any reference number. If the insurer updates its decision, keep the revised statement with the original.

Contact the provider about its bill

The billing office can explain charges, issue an itemized statement, and review payments you've already made. Give the office the relevant account number and describe the difference you found.

If the due date is close, tell the billing office that you're resolving a question about the claim. Ask about the account's status and when you should expect an updated statement. Keep a record of the conversation and any documents you send.

What to do if a claim is denied

A denial on an EOB can be unsettling, but you have options for asking the insurer to review its decision. Read the decision and the accompanying notice carefully, then keep copies of both with the rest of your claim documents.

Contact the insurer if the notice is unclear. Ask what information it needs for a review and how to submit it. Your provider's office may also be able to help you gather records related to the care you received.

HealthCare.gov outlines how to appeal an insurance decision, including the opportunity for an independent review. Follow the instructions and deadlines in your notice, and keep copies of anything you submit.

An appeal doesn't guarantee a different decision. It does give you a formal way to request a review rather than assuming the first decision is the final word.

Use what you learn when comparing plans

If you're shopping for private health insurance, an EOB can prompt useful questions about the coverage you want next. Pay attention to how often your household uses care and which providers matter to you.

Compare the monthly premium alongside the deductible, coinsurance, out-of-pocket maximum, and network. A lower premium can be appealing, but it doesn't show your full cost when you need care. Our guide to comparing health insurance plans walks through those choices.

Prescription benefits deserve their own look. Some plans apply prescription copays before the medical deductible is met, while others have different deductible rules. Our explanation of prescription drug coverage covers formularies and medication tiers.

Common questions about EOBs

Should I pay the provider as soon as a bill arrives?

Review the bill against the relevant EOB first. If the statements don't match or a payment is missing, contact the insurer or billing office about the disputed entry.

What if I receive more than one EOB for a visit?

Separate providers can submit separate claims. Match each statement by patient, provider, and service date before comparing it with the corresponding bill.

Does a deductible apply to every service?

No. Plans can cover some services before the deductible is met, and they may use different cost-sharing rules for different types of care.

Make your next bill easier to understand

An EOB gives you a record to use alongside the provider's statement. Matching the documents and keeping payment receipts can help you identify a problem before you pay.

If a claim or bill remains unclear, contact the company responsible for that part of the account. A clear answer makes it easier to decide what to do next.