Bills after surgery: facility, surgeon, anesthesia, and more

You had surgery, and now the bills are arriving. There's one from the hospital or surgery center, one from the surgeon, and one from an anesthesia group you may not recognize. More may follow. Together, they can add up to far more than you expected.

That doesn't always mean something is wrong. But it does mean each bill is worth checking. This guide explains who sends each bill, what it should cover, and which rules protect you. It also shows how to check each one against your explanation of benefits (EOB) before you pay.

The bills you'll get

A single surgery can create 4 to 7 separate bills. Each provider bills on its own, often weeks apart. Here's who usually sends them.

Each of these bills should have its own EOB from your plan. If you have a bill with no EOB, the provider may not have sent the claim to your insurer yet.

What the surgeon's fee covers

Most surgeons are paid a single fee for the surgery and the routine care around it. Medicare calls this the global surgical package. Under Medicare's rules, it covers 3 time frames:

The package includes routine follow-up visits, dressing changes, removing stitches or staples, and pain management from the surgeon. It doesn't include care for a different problem, tests like X-rays, or a return trip to the operating room for a complication. Many private plans use similar rules, but details depend on your plan.

So if you get a separate bill for a routine post-op visit with your surgeon, it's worth asking why.

What does it cost?

Surgery prices vary a lot by procedure, by place, and by plan. The setting matters too. The same outpatient surgery usually costs much more at a hospital outpatient department than at a stand-alone surgery center.

Medicare's Procedure Price Lookup shows national averages for 2026. These are Medicare's rates, not private insurance prices. They include the facility fee and the surgeon's fee, but not the anesthesia team or other doctors.

Private plans usually pay more than Medicare, and prices differ widely by region. A Peterson-KFF analysis of 2018 large employer claims found an average price of $35,263 for a knee or hip replacement. The average ranged from $25,044 in the Baltimore area to $56,739 in the New York City area.

What you owe depends on your deductible, coinsurance, and out-of-pocket maximum. Your insurer's cost estimator can show your likely share before surgery. Our guide to knee replacement cost walks through one common surgery in detail.

What goes wrong most often

Most problems with surgery bills fall into a few groups. Each one has a fix.

• An out-of-network provider at an in-network facility. The hospital is in your network, but the anesthesia group, assistant surgeon, or pathologist isn't. Federal law usually limits what they can bill you. See out-of-network anesthesia bills and whether the No Surprises Act applies.
• A denial for missing prior authorization. Your plan may require approval before surgery. If nobody asked for it, the claim can be denied. See prior authorization denied.
• Charges that appear twice. A supply, drug, or implant can be listed twice, or billed by both the facility and a doctor. See duplicate charges on a medical bill.
• Follow-up care billed on its own. A routine post-op visit may be billed even though the surgeon's fee already covers it. Our list of common medical billing errors explains how to spot coding problems like this.
• A bill sent before the claim was done. The bill may show the full price, without your plan's discount or payment. See why a medical bill is higher than the EOB.
• A lab or pathology bill you didn't expect. Tissue or blood may go to an outside lab. See unexpected lab bills.

Your protections

Several federal rules protect you after surgery. Which ones apply depends on your coverage.

If you have private health insurance, the No Surprises Act has protected you since January 1, 2022. It covers employer plans, Marketplace plans, and plans you buy on your own. For surgery at an in-network hospital, hospital outpatient department, or ambulatory surgical center, out-of-network providers can't bill you more than your in-network share. That's your usual deductible, copay, and coinsurance.

Some providers can never ask you to give up this protection. At an in-network facility, that includes:

• Anesthesiology, pathology, radiology, and lab work
• Assistant surgeons, hospitalists, and intensivists
• Emergency medicine and neonatology

Other out-of-network providers, like a surgeon you choose, may ask you to sign a notice and consent form before planned care. If you sign it, you'll likely pay more. You never have to sign. If you don't, the provider may decline to treat you, so you may need an in-network surgeon instead.

The law has limits. It doesn't cover planned surgery at an out-of-network facility. It also doesn't cover a doctor's office that isn't part of a hospital.

If you're uninsured or paying yourself, you have a right to a good faith estimate. You get one when you schedule care at least 3 business days ahead, or when you ask. For now, each estimate usually covers only 1 provider, so ask the facility, surgeon, and anesthesia group for their own. If a bill is at least $400 more than that provider's estimate, you can dispute it. You must start within 120 days of the first bill. Our guide to good faith estimate disputes explains how.

If you have Medicare or Medicaid, the No Surprises Act doesn't apply, but you have other protections. Providers who take Medicare assignment can bill you only your deductible and coinsurance. Medicaid providers must accept Medicaid's payment, plus any required cost sharing, as payment in full.

State rules may add more protections. Your state insurance department can tell you what applies where you live.

How to check your bills

Set aside an hour and gather every bill and every EOB from your surgery. Then work through these steps.

1. List every provider. Write down each bill you've received and each EOB. Note any EOB without a bill yet, and any bill without an EOB.
2. Match each bill to its EOB. Check the patient name, date of service, and provider name. Our guide to comparing your medical bill vs. EOB shows how, 1 number at a time.
3. Compare what you owe. If an in-network provider asks for more than your share on the EOB, call and ask why.
4. Check network status on each EOB. If an out-of-network provider treated you at an in-network facility, your EOB should show in-network cost sharing.
5. Look for routine follow-up charges. A post-op visit with your surgeon inside the global period usually shouldn't be billed separately.
6. Check for denials. If your plan denied a claim, the EOB will give a code or reason. Our guide to denial codes on your EOB explains common ones.
7. Ask for an itemized bill. If a bill shows only a total, ask for a list of every charge. Check implants, drugs, and supplies line by line. See how to get an itemized bill.

Say Priya has her gallbladder removed at an in-network hospital outpatient department. She has $1,500 left on her deductible and 20% coinsurance after that. The assistant surgeon is out-of-network. Her plan processes the hospital claim first, so the deductible applies there.

Bill	Charge	Amount used for her share	Plan paid	EOB says she owes	Bill asks for
Hospital	$18,000	$6,000	$3,600	$2,400	$2,400
Surgeon	$3,200	$1,200	$960	$240	$240
Surgeon's 2-week follow-up visit	$150	$0	$0	$0	$150
Anesthesia group	$2,400	$900	$720	$180	$180
Pathology lab	$400	$100	$80	$20	$20
Assistant surgeon (out-of-network)	$1,500	$300	$240	$60	$1,260
Total				$2,900	$4,250

Here's how her share of the hospital claim works: her $1,500 deductible, plus 20% of the remaining $4,500, which is $900. That's $2,400.

The bills ask for $1,350 more than her EOBs. The gap comes from 2 lines:

• The $150 follow-up visit. Her plan denied it as part of the surgery's payment, and her EOB says she owes $0.
• $1,200 from the assistant surgeon. That's the full charge minus the plan's payment ($1,500 − $240 = $1,260), less the $60 she actually owes. Under the No Surprises Act, she owes only $60.

Priya calls each billing office, gives the claim numbers, and asks for corrected bills. She pays the $2,840 that matches her EOBs on the other bills, and $60 once the assistant surgeon corrects its bill.

If a call doesn't fix a bill, put your request in writing. Our guide on how to dispute a medical bill walks through it. For an out-of-network bill the law should have stopped, our surprise bill dispute letter gives you the words.

How to avoid a surprise next time

For planned surgery, a few calls 2 to 3 weeks ahead can prevent most of these problems.

• Check every provider's network status. Ask the surgeon's office which facility, anesthesia group, and lab it uses. Then confirm each one with your plan. Our checklist on how to check if a doctor is in network shows how to keep proof.
• Confirm prior authorization. Ask the surgeon's office whether your plan needs to approve the surgery and who will ask for it. Then call your plan to confirm. Approval isn't a promise to pay, but skipping it can lead to a denial.
• Get a price estimate. Use your insurer's cost estimator, or ask for a good faith estimate if you're paying yourself. Ask what could be added if plans change during surgery.
• Ask about the setting. If a surgery center is an option, ask whether it's in your network and whether it fits your care. It's often less expensive.
• Read any form before you sign it. If you're asked to give up your surprise billing protections, ask whether an in-network provider can do the same care.
• Plan for after you go home. Ask whether physical therapy, equipment, or home care will need approval, and check those providers too.

Our guide on how to avoid surprise medical bills covers each step in more detail.

When to get help

You can fix many surgery bill problems with a few calls. It's worth getting help when:

• A provider won't correct a bill that doesn't match your EOB.
• An out-of-network bill looks like one the No Surprises Act should have stopped.
• Your plan denied the surgery claim and you need to appeal.
• A bill is already in collections, or you're managing bills for someone else.

Start with your insurer's member services team. The number is on your insurance card. For surprise bills, the federal No Surprises Help Desk answers questions and takes complaints at 1-800-985-3059. Your state insurance department or consumer assistance program can also help.

A medical bill advocate can make the calls for you. For a large bill or a lawsuit, an attorney can explain your options.

If your bills are correct but more than you can pay, you still have options. Our guides to hospital charity care and how to negotiate a hospital bill are good places to start. You can also ask about medical payment plans.