Health insurance billing follows one order. First, your provider sends a claim to your plan. Next, the plan prices it at the network rate, pays its share and sends you an Explanation of Benefits. Only then does the provider bill you for what is left. So always match that bill to your EOB before you pay.
- An Explanation of Benefits (EOB) is not a bill, and your provider's bill should not be higher than the patient balance on it.
- In-network providers can't balance bill you for covered services, which means they can't charge the gap between their full price and the allowed amount.
- The No Surprises Act limits most surprise bills for emergency care, air ambulance rides and care at in-network hospitals to your in-network cost sharing.
- If you pay cash and your bill comes in at least $400 over your good faith estimate, you may dispute it within 120 days of the bill date.
- The No Surprises Help Desk at 1-800-985-3059 takes questions and complaints about surprise bills.
How health insurance billing works, step by step
Most confusion starts because three parties touch every bill: you, your provider and your plan. Each one sends you something different, and the order matters. Here is the path a typical in-network visit takes.
- Check in with your ID card
The front desk records your plan and may collect a copay. So bring your current card to every visit.
- Your provider codes the visit
A biller turns your care into codes for what was done and why. Then the office sends the claim to your plan.
- The plan prices the claim
Your plan checks coverage and applies its allowed amount. Next, it subtracts your deductible, copay or coinsurance.
- An EOB arrives
Your plan mails or posts a statement that shows what it paid and what you may owe.
- Finally, the bill comes
The provider bills you for the balance. Compare it to the EOB, and only then pay.
This flow is the core of health insurance billing for almost every plan. To see the claim side in more detail, read about the seven steps a claim takes. Also learn to decode the numbers on your ID card, since a wrong member number can stall everything.
Provider bill vs EOB: what each one tells you
People often pay the wrong document, or pay too soon. In fact, the EOB and the bill look alike but do different jobs. Keep both until the claim is settled.
- Shows what the provider charged and what the plan allowed
- Lists what the plan paid and your patient balance
- It is not a bill, so you don't pay it
- Asks you to pay your share
- May show payments you already made
- Should not be higher than the EOB's patient balance
Reading an EOB line by line
Here is a sample MRI claim, with made-up numbers for illustration. Your EOB uses similar labels, though the wording can vary by carrier.
| EOB line | Sample | What it tells you |
|---|---|---|
| Provider charges | $1,000 | The full price the provider billed |
| Allowed amount | $450 | So this is the price your plan agreed to pay |
| Paid by plan | $90 | Then the plan paid 20% after your deductible |
| What you owe | $360 | Also called the patient balance |
| Remark code | A short code | Its meaning appears at the bottom of the EOB |
In this example, you had $300 left on your deductible. So you paid that first, plus 20% of the other $150, which is $30. Your total share is $360, and the plan pays $90. If the MRI bill says $1,000, something is wrong. In medical billing, the allowed amount is the number that matters most.
Match the provider bill to the EOB
- The patient name, date of service and provider match
- The amount due equals the EOB's patient balance, minus any payments you made
- Each service on the bill also appears on the EOB
- The claim number or dates line up
If any line doesn't match, call before you pay. Also check where a claim stands in your plan's portal, since a bill sometimes arrives before the claim finishes.
A licensed Vivna agent can help you read your EOB, spot what doesn't match and plan your next call, at no cost to you.
What balance billing is and when it can happen
Balance billing means a provider charges you the gap between its full price and your plan's allowed amount. For example, HealthCare.gov describes a $100 charge with a $70 allowed amount. In that case, the provider could bill you the other $30. However, an in-network provider may not balance bill you for covered services.
So balance billing is mostly an out-of-network problem. For instance, if you choose an out-of-network specialist for a planned visit, that provider may bill you the difference. Plus, that extra amount usually doesn't count toward your cap. Before planned care, check what in-network and out-of-network care costs.
Read the EOB before you pay the bill.The rule our licensed agents repeat most
How the No Surprises Act protects your health insurance billing
Since January 1, 2022, a federal law has blocked most surprise bills in situations you can't control. In those cases, the provider can bill you no more than your plan's in-network cost sharing. In addition, what you pay counts toward your in-network deductible and out-of-pocket limit.
Where the law protects you
- Most emergency care, even at an out-of-network hospital
- Out-of-network doctors at an in-network hospital or surgery center, such as anesthesiologists
- Out-of-network air ambulance rides for covered services
- Marketplace and job-based plans alike
Where it doesn't reach
- Ground ambulance rides
- Non-emergency care at an out-of-network facility you chose
- Services your plan doesn't cover at all
- Stand-alone dental and vision plans
Also, Medicare, Medicaid, TRICARE and VA care have their own billing rules. Questions? Call the No Surprises Help Desk at 1-800-985-3059.
Common billing errors to catch early
Mistakes happen, because medical billing runs on codes and handoffs. Still, most health insurance billing mistakes are easy to spot once you know where to look. So scan every bill for these problems.
- Two charges for the same service on the same day
- A test or supply you never received
- An old plan or wrong member ID on file
- A bill sent before your plan processed the claim
- An amount due higher than your EOB's patient balance
- A copay charged twice, at check-in and again on the bill
Ask the billing office for an itemized bill whenever the total looks off. It lists every charge, so duplicates jump out. Then, before you hang up, write down the rep's name, the date and a reference number. Also ask them to hold the account while you sort it out.
How to dispute a medical bill
Most disputes end with one or two phone calls. However, you need the right paperwork and the right order. Follow these steps when health insurance billing goes wrong.
- Gather your papers
Pull the bill, the EOB and any receipts. Also note the claim number.
- Call the provider's billing office
Explain what doesn't match the EOB. Often the fix is a resubmitted claim or a corrected code.
- Next, call your plan
Ask why the claim paid the way it did. If it was denied, ask for the reason in writing.
- Appeal a denial
You generally have 180 days from a denial to file an internal appeal with your plan.
- Report a surprise bill
If you think a bill breaks the No Surprises Act, file a complaint through CMS or the help desk.
If you paid without insurance
Uninsured and self-pay patients have a separate right. If you got a good faith estimate and the bill is at least $400 higher, you may qualify for patient-provider dispute resolution. You must start within 120 calendar days of the bill date, and the fee is $25. For appeals with a plan, see how to win an insurance appeal and how long each claim step takes.
Don't ignore a bill while you dispute it. Instead, call the provider, say you are disputing the charge and ask for a hold in writing. Also, owing your deductible is not a billing error, even when the amount feels high.
How to avoid billing surprises next time
A little prep before care saves a lot of calls later. So match your plan to how you use care, and check the network every time.
Confirm prior authorization and ask if every provider, including the anesthesiologist, is in network.
First search the carrier directory, then call the office to confirm your exact plan.
Ask for a good faith estimate in writing, since it protects your dispute rights.
Compare other plans at Open Enrollment, since a lower deductible can mean smaller bills.
You can search each carrier's doctor directory before any visit. Also, our guides explain a closer look at deductibles and how the yearly spending cap protects you. When you're ready, browse ACA and private medical plans or call a licensed Vivna agent at 888-730-6001.
Health insurance billing: FAQs
Why did I get a bill after my insurance paid?
The bill is for your share of the allowed amount. That can include your deductible, a copay or coinsurance. Your plan pays its part first, then the provider bills you for the rest. Before you pay, compare the bill to your EOB. The amount due should not be higher than the patient balance the EOB shows.
Is an Explanation of Benefits a bill?
No. An EOB is a statement from your health plan that shows what the provider charged, what the plan allowed and paid, and what you may owe. You don't pay the EOB. Instead, keep it and use it to check the provider's bill when it arrives. If the two don't match, call the provider's billing office.
Can a doctor bill me for what my plan didn't pay?
It depends on the network. An in-network doctor can't bill you for the gap between their full charge and the allowed amount for covered care. An out-of-network doctor can, unless the No Surprises Act applies. For example, that law covers most emergency care and certain care at in-network hospitals.
How long does health insurance billing take?
For care you already received, plans generally must decide a claim within 30 days. After that, your EOB arrives, and the provider's bill usually follows. So a few weeks between your visit and the bill is common. If a bill shows up before the EOB, call your plan to confirm the claim was processed.
What should I do if a medical bill looks wrong?
First, compare it to your EOB and ask the provider for an itemized bill. Then call the billing office and explain what doesn't match. If the plan denied the claim, you can file an internal appeal within 180 days. For surprise bills, call the No Surprises Help Desk at 1-800-985-3059.
Can a licensed agent help me with a confusing bill?
Yes. A licensed agent can help you read your EOB, explain what your plan should have paid and show you who to call next. Vivna's agents work with 50+ carriers, at no cost to you. Call 888-730-6001 Monday through Friday, 9am to 6pm. You can also browse hundreds of answers to coverage questions.
Vivna's licensed agents compare plans from 50+ carriers. Call Monday through Friday, 9am to 6pm.
Sources
- CMS: Understanding your Explanation of Benefits
- HealthCare.gov: Balance billing
- CMS: No Surprises Act overview of key consumer protections
- HealthCare.gov: Internal appeals
- CMS: Model notice of surprise billing protections
- CMS: How to dispute a bill
Vivna Insurance is a licensed, independent health insurance agency (NPN 19168641). We are not affiliated with HealthCare.gov or any government agency. Plan availability, networks and benefits vary by state and change over time.
Related guides
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