Yes, Medicare covers aortic aneurysm surgery when it is medically necessary. Both open surgical repair and minimally invasive endovascular repair are covered, whether the aneurysm is in the abdominal or thoracic portion of the aorta. The specific costs you’ll pay out of pocket depend on whether the procedure is performed as an inpatient hospital stay (covered under Part A) or in an outpatient setting (covered under Part B), and whether you have Original Medicare or a Medicare Advantage plan.
What Medicare Considers Medically Necessary
Medicare does not cover aortic aneurysm repair simply because an aneurysm exists. The aneurysm generally needs to meet certain size or growth criteria before surgery is approved. Abdominal aortic aneurysms smaller than about 5 to 5.5 centimeters are typically monitored rather than operated on, and Medicare covers surveillance ultrasounds every six months for aneurysms larger than 4 centimeters in diameter to track their growth.
Surgery becomes medically necessary when the aneurysm reaches a size where the risk of rupture outweighs the risks of the procedure itself, or when it’s growing rapidly, causing symptoms like abdominal or back pain, or has already ruptured. Emergency repair for a ruptured aneurysm is always covered. Your vascular surgeon’s documentation of why surgery is needed at a given time is what Medicare reviews when determining coverage.
Part A Coverage for Inpatient Surgery
Most aortic aneurysm repairs require a hospital admission, which falls under Medicare Part A. Open surgical repair, where the surgeon replaces the weakened section of the aorta with a synthetic graft through a large incision, typically requires several days in the hospital. Endovascular repair, a less invasive approach using a stent graft threaded through the arteries, usually means a shorter stay but still often involves at least one or two nights.
Under Part A, you pay a per-benefit-period deductible for the hospital stay itself. For 2025, that deductible is $1,676. After that, Part A covers the full cost for the first 60 days of a hospital stay with no additional daily copay. Since most aortic repairs involve stays well under 60 days, the hospital deductible is often your primary Part A expense. If you have a Medigap (supplemental) policy, it may cover some or all of that deductible.
Part B Coverage for Surgeon and Outpatient Costs
Even during an inpatient stay, certain charges fall under Part B rather than Part A. The surgeon’s fees, anesthesia, and any outpatient imaging or lab work done before or after the procedure are billed through Part B. In 2025, Part B has an annual deductible of $257. After you meet that deductible, you pay 20% of the Medicare-approved amount for covered services.
For a major surgery like aortic repair, that 20% coinsurance on the surgeon’s and anesthesiologist’s fees can add up to several thousand dollars. This is where supplemental coverage, whether through a Medigap policy, Medicaid, or employer retiree benefits, makes a significant financial difference. Without secondary insurance, the out-of-pocket portion of a procedure that can cost $30,000 to $80,000 or more in total charges becomes substantial, even though Medicare is paying the majority.
Medicare Advantage Plans
If you have a Medicare Advantage plan (Part C), your plan is required to cover everything Original Medicare covers, including aortic aneurysm surgery. However, the cost-sharing structure is different. Instead of the Part A deductible plus 20% Part B coinsurance, your Advantage plan has its own copays, coinsurance rates, and an annual out-of-pocket maximum. That maximum caps your total spending for the year, which Original Medicare alone does not offer.
One important difference: Medicare Advantage plans can require prior authorization before approving surgery. This means your surgeon’s office may need to submit documentation to the plan and receive approval before scheduling the procedure. Emergency surgery for a ruptured aneurysm would not require prior authorization. Advantage plans may also require you to use in-network surgeons and hospitals, so checking your plan’s network before a planned repair matters.
Free Screening for At-Risk Individuals
Medicare covers a one-time abdominal aortic aneurysm screening ultrasound at no cost to you, but only if you meet specific criteria. You qualify if you are a man between ages 65 and 75 who has smoked at least 100 cigarettes in your lifetime, or if you have a family history of abdominal aortic aneurysm regardless of sex. You also need a referral from your provider.
This screening is part of Medicare’s preventive benefits and has zero out-of-pocket cost when performed by a provider who accepts Medicare assignment. It’s a single opportunity, not an annual benefit, so it can only be used once. If the screening detects an aneurysm, follow-up imaging and monitoring are then covered as diagnostic services under Part B, subject to the standard deductible and 20% coinsurance.
Recovery and Follow-Up Coverage
After aortic aneurysm surgery, you may need several types of follow-up care that Medicare also covers. If you require a skilled nursing facility after discharge, Part A covers up to 100 days per benefit period, with full coverage for the first 20 days after a qualifying hospital stay of at least three days. Home health services, including skilled nursing visits and physical therapy at home, are covered under Part A or Part B with no coinsurance if you are homebound and your doctor orders the care.
Cardiac rehabilitation is another benefit worth knowing about. Medicare Part B covers comprehensive cardiac rehab programs for people who have had certain qualifying conditions, including heart valve repair or replacement and stable chronic heart failure. While aortic aneurysm repair itself is not listed as a standalone qualifying condition for cardiac rehab, patients who also have one of the covered heart conditions can access these supervised exercise and education programs. Your cardiologist or vascular surgeon can help determine if you qualify.
Follow-up imaging to monitor the repair, particularly CT scans after endovascular stent grafts to check for leaks around the device, is covered under Part B as medically necessary diagnostic testing. These scans are typically done at regular intervals in the first year and then annually, with each scan subject to the 20% coinsurance after your deductible is met.