Your doctor booked your surgery at an outpatient surgery center instead of the hospital, and yes, Medicare covers it. Part B pays for approved procedures at a Medicare-certified ambulatory surgical center (ASC), the kind of place built for same-day surgery you can walk out of the same afternoon. What it costs you, and why the setting matters, is worth knowing before the date.

In This Guide

Does Medicare Cover Surgery at an Outpatient Surgery Center?

The short answer is yes. Medicare Part B covers the facility fee for approved surgical procedures done at a Medicare-certified ambulatory surgical center. You can see the rule on Medicare's ambulatory surgical center coverage page.

So what is an ASC, exactly? It's an outpatient facility built for same-day surgery. In most cases you're released within 24 hours, and there's no hospital admission involved. Think of it as the ground between a doctor's office and a full hospital stay: real surgery, real anesthesia, real recovery time, but you go home the same day.

Plenty of common procedures happen this way now, from cataract removal to colonoscopies to many orthopedic and pain procedures. If yours is one Medicare has approved for the ASC setting, Part B is on the hook for the facility side.

What Does Surgery at a Medicare-Covered Outpatient Center Cost?

Covered doesn't mean free. Here's how the money actually works.

Once you've met your annual Part B deductible ($283 in 2026), you generally pay 20% of the Medicare-approved amount., And you pay 20% of the Medicare-approved amount on two separate bills: one to the surgery center for the facility fee, and one to the doctor or doctors who treat you. Depending on the procedure, other costs can apply too.

That deductible resets every year, so whether you've already hit it depends on what other Part B care you've had. If you want to walk through how the Part B deductible and coinsurance fit together with your other Medicare costs, our guide to what Medicare costs lays out the full picture.

Surgery Center or the Hospital: Why the Setting Changes the Bill

Why does it matter whether your surgery happens at an ASC or inside a hospital? Because the two can be billed under different parts of Medicare, and one of them carries a second deductible.

A surgery center is outpatient care. It runs through Part B, uses the 20%-after-the-deductible math above, and sends you home the same day with no admission.

A hospital admission is a different animal. The moment you're admitted as an inpatient, you're under Part A, and that triggers the inpatient hospital deductible: $1,736 per benefit period in 2026, before any day-based coinsurance even starts. It's a separate deductible from the Part B one, and it resets with each new benefit period.

This isn't a rule that one setting is always cheaper than the other. Your real cost depends on the procedure and what else you've paid this year. The point is simpler: an outpatient surgery center keeps you out of the inpatient-admission column, and out of that Part A deductible, entirely.

Not Every Procedure Is Approved for a Surgery Center

Coverage at an ASC comes with a condition worth knowing before you show up. Not every operation is approved for the outpatient setting.

Medicare covers only procedures that can be safely performed in an ambulatory surgical center, and it keeps and updates a list of which surgeries qualify. If your procedure is on that approved list, Part B picks up the facility fee the usual way. If it isn't, Medicare won't pay the ASC's facility fee, and you'd be left responsible for it.

That's the whole reason to confirm ahead of time rather than assume. A surgery that's routine at an ASC for one person might, for someone with other health conditions, be one a surgeon wants done in a hospital instead. Cataract surgery is a good example of a procedure Medicare commonly covers in the outpatient setting; our guide to Medicare and cataract surgery walks through how that one is covered.

How to Check Before Your Surgery Date

A few minutes of asking beats a surprise bill. Before your procedure, it's worth confirming three things:

  1. The center is Medicare-certified. Coverage runs through the ASC's certification, so ask the facility directly, or check with Medicare.
  2. Your procedure is approved for the ASC setting. Ask your surgeon's office whether this specific surgery is on Medicare's approved list for an ambulatory surgical center.
  3. Your providers accept Medicare assignment. When a provider accepts assignment, they agree to charge you only the Medicare deductible and the 20% coinsurance on the Medicare-approved amount, rather than a higher billed charge, which keeps your share predictable.

If you're on a Medicare Advantage plan rather than Original Medicare, add one more call: your plan sets its own network and cost-sharing, so confirm the surgery center is in network and ask what your copay or coinsurance will be.

Frequently Asked Questions

Does Medicare cover surgery at an outpatient surgery center?

Yes. Medicare Part B covers approved surgical procedures at a Medicare-certified ambulatory surgical center (ASC), the outpatient facilities built for same-day surgery. After you meet the Part B deductible, you generally pay 20% of the Medicare-approved amount to both the center and the doctors who treat you.

What will I actually pay out of pocket?

After the annual Part B deductible ($283 in 2026), you owe 20% of the Medicare-approved amount, split across two bills: the surgery center's facility fee and the doctor's services. Other costs can apply depending on the procedure, and a Medicare Advantage plan may use different copays.

Is a surgery center cheaper than having the surgery in the hospital?

Not automatically. Your cost depends on the procedure and what you've already paid toward your deductibles this year. What an outpatient surgery center does do is keep you out of a hospital admission, which is what triggers the separate Part A inpatient deductible ($1,736 per benefit period in 2026).

Does Medicare cover every procedure at a surgery center?

No. Medicare covers only surgeries it has approved as safe to perform in an ambulatory surgical center, and it keeps a list of which ones qualify. If a procedure isn't on that list, Medicare won't pay the ASC facility fee for it, so confirm with your provider before the date.

Does Medicare Advantage cover an ambulatory surgical center?

Your coverage runs through your Medicare Advantage plan's own rules, network, and cost-sharing rather than the standard Part B math. Check that the surgery center is in your plan's network and ask the plan what your out-of-pocket cost will be.

Learn More

MedicareHow Much Does Medicare Cost?How much does Medicare cost in 2026? Part A, B, C, and D premiums, deductibles, and coinsurance, plus IRMAA and ways to lower your Medicare costs. MedicareDoes Medicare Cover Cataract Surgery?Medicare Part B covers cataract surgery plus one pair of glasses or contacts afterward. See what you pay in 2026, the eyeglasses exception, and lens limits. MedicareOriginal Medicare vs. Medicare Advantage: How to ChooseCompare original Medicare vs Medicare Advantage on cost, networks, the $9,250 cap, and switching back. A neutral 2026 side-by-side to help you choose.

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The information on Brevy.com is for educational purposes only and is not a substitute for professional legal, financial, or medical advice. Rules vary by state and program and change frequently. Always verify with the relevant agency or a qualified professional. Brevy is not a law firm, financial advisor, or healthcare provider.

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