Medicare Part A covers inpatient heart surgery when you have it done in a hospital, but only the hospital stay itself — not the surgeon's fee or certain other costs

If your cardiologist recommends heart surgery and you are admitted to a hospital as an inpatient, Medicare Part A pays for your hospital bed, nursing care, operating room use, and related hospital services. This includes bypass surgery, valve replacement, heart transplant, and other procedures that require an overnight stay. Part A does not pay the surgeon's bill, the anesthesiologist's bill, or most outpatient tests done before surgery.

The amount you pay depends on whether you have met your deductible for the year and how long you stay. For 2024, the Part A deductible is $1,632 per benefit period — a span that starts when you enter the hospital and ends 60 days after you leave. If you stay longer than 60 days in the same hospital for the same condition, you pay a daily coinsurance amount for each day after day 60.

Key Takeaways

  • Medicare Part A covers the hospital facility costs for inpatient heart surgery, including the operating room, bed, and nursing care.
  • You pay the Part A deductible (currently $1,632) once per benefit period, then Part A covers most hospital costs at no additional charge for the first 60 days.
  • The surgeon, cardiologist, and anesthesiologist send separate bills that Medicare Part B covers at 80 percent after you meet the Part B deductible.
  • Outpatient heart tests, imaging, and consultations before surgery are covered by Part B, not Part A.
  • If your surgery is done at an outpatient surgical center instead of a hospital, Part A does not cover it — Part B does, with different cost-sharing rules.

What Part A actually pays for during your hospital stay

Part A covers the cost of the hospital facility itself. This means your room, meals, nursing staff, medications given in the hospital, blood transfusions, and use of the operating room. It also covers pre-surgery testing done while you are admitted as an inpatient, such as EKGs, chest X-rays, and lab work ordered by your hospital team.

Part A does not cover the doctors' services. Your surgeon, cardiologist, anesthesiologist, and any other physicians involved in your care send their own bills to Medicare Part B. Those are separate from the hospital bill. Part A also does not cover any equipment or supplies you take home after discharge, such as a heart monitor or compression stockings — those go to Part B.

How your costs work under the Part A deductible and coinsurance

When you are admitted to the hospital for heart surgery, you pay the Part A deductible ($1,632 in 2024) if you have not already met it that year. After you pay the deductible, Part A covers 100 percent of your hospital costs for days 1 through 60 of your stay.

If you stay in the hospital longer than 60 days for the same condition, you enter what Medicare calls the coinsurance period. From day 61 to day 90, you pay a daily coinsurance amount (currently $408 per day in 2024) and Part A covers the rest. If you stay beyond 90 days, you have access to lifetime reserve days — 60 additional days over your entire lifetime — but you pay a higher daily coinsurance ($816 per day in 2024) for those days.

Most heart surgery patients go home within 5 to 10 days, so the coinsurance period rarely applies. However, if you have complications or need extended recovery, it is important to understand these limits.

What Medicare Part B covers separately from Part A

While Part A pays the hospital facility bill, Medicare Part B covers the doctors and certain services. Your surgeon's fee, the cardiologist's consultation, the anesthesiologist's services, and the pathologist's reading of tissue samples all come under Part B. You pay the Part B deductible (currently $240 in 2024) once per year, then Part B covers 80 percent of the approved amount for each doctor's service. You pay the remaining 20 percent as coinsurance.

Pre-surgery consultations and testing done before you are admitted to the hospital are also Part B services. If your cardiologist orders an echocardiogram, stress test, or CT scan in the office or at an outpatient imaging center, Part B covers that at 80 percent after the deductible. These costs do not count toward your Part A deductible.

If you have a Medigap policy or Medicare Advantage plan, those plans may cover some or all of your Part B coinsurance, depending on your specific coverage.

Outpatient heart surgery and how it is covered differently

Some heart procedures can be done in an outpatient surgical center or hospital outpatient department without an overnight stay. Examples include certain catheter-based procedures, pacemaker insertion, or valve repair done with minimally invasive techniques. If your surgery is outpatient, Part A does not cover it at all — instead, Medicare Part B covers the facility costs.

For outpatient surgery, you pay the Part B deductible and then 20 percent coinsurance for the facility and the doctors' services combined. The total out-of-pocket cost can be lower than inpatient surgery because you avoid the Part A deductible, but the percentage you pay (20 percent) is higher than the inpatient model (where you pay a flat deductible and then nothing for facility costs).

Ask your surgeon before the procedure whether it will be done as inpatient or outpatient, because that determines which Medicare part pays and how much you will owe.

Rehabilitation and skilled nursing care after heart surgery

If you need inpatient rehabilitation or skilled nursing care after your hospital stay, Part A covers that too — but only if you meet specific conditions. You must have been admitted to the hospital for at least 3 days, and you must be admitted to the rehabilitation or skilled nursing facility within 30 days of leaving the hospital. The facility must be Medicare-certified.

Part A covers the first 20 days of skilled nursing or rehabilitation at 100 percent (after you have already paid the hospital deductible). From day 21 to day 100, you pay a daily coinsurance amount (currently $204 per day in 2024) and Part A covers the rest. After day 100, you pay all costs yourself.

Many heart surgery patients do not need inpatient rehabilitation — they go home and do outpatient cardiac rehabilitation instead. Outpatient cardiac rehab is covered by Part B at 80 percent after the deductible.

What to ask your doctor and hospital before surgery

Before your surgery, ask your surgical team whether the procedure will be inpatient or outpatient. Request an estimate of how many days you are likely to stay in the hospital. Ask whether any pre-surgery testing will be done as an inpatient (covered by Part A) or outpatient (covered by Part B).

Contact your Medicare plan or call Medicare directly at 1-800-MEDICARE to confirm your current deductible and coinsurance amounts for the year. If you have a Medigap or Medicare Advantage plan, call that plan to ask what out-of-pocket costs you will owe for inpatient heart surgery.

Ask the hospital's billing department for an estimate of the facility charges and whether any of those charges might not be covered. Request the names and credentials of all physicians who will be involved in your care so you can verify they accept Medicare assignment (meaning they accept Medicare's approved amount as full payment for their services).

Frequently Asked Questions

Does Medicare Part A cover the surgeon's fee for heart surgery?

No. Part A covers only the hospital facility costs. The surgeon's fee is billed separately under Medicare Part B. You pay Part B coinsurance (20 percent of the approved amount) after you meet the Part B deductible.

What happens if I stay in the hospital longer than 60 days after heart surgery?

From day 61 to day 90, you pay a daily coinsurance amount ($408 per day in 2024) and Part A covers the rest. If you stay beyond 90 days, you can use lifetime reserve days at a higher daily coinsurance ($816 per day in 2024). Most heart surgery patients do not stay this long.

If my heart surgery is done at an outpatient center, does Part A still cover it?

No. Outpatient procedures are covered by Medicare Part B, not Part A. You pay the Part B deductible and 20 percent coinsurance for both the facility and the doctors' services. The total cost structure is different from inpatient surgery.

Does Medicare Part A cover cardiac rehabilitation after I go home?

Outpatient cardiac rehabilitation is covered by Part B at 80 percent after the deductible. If you need inpatient rehabilitation in a skilled nursing facility, Part A covers that under the same rules as other inpatient skilled nursing care — 100 percent for the first 20 days, then coinsurance after that.

Will my Medigap policy cover the Part A deductible and coinsurance?

Most Medigap policies cover the Part A deductible and coinsurance, but the exact coverage depends on which plan you have. Contact your Medigap insurer before surgery to confirm what costs they will pay.