Coronary artery bypass grafting (CABG), or heart bypass surgery, is one of the more expensive procedures in the United States, with billed costs that typically range from about $40,000 to $150,000 or more. The final bill depends on the number of grafts, whether a heart-lung machine is used, the length of the hospital stay, and any complications. Medicare and private insurance cover medically necessary CABG, so most patients pay far less than the sticker price, often up to their plan’s out-of-pocket maximum.
| Cost item | Typical 2026 US range | Insurance coverage |
|---|---|---|
| CABG billed total (hospital + surgical team) | $40,000 to $150,000 or more | Covered by Medicare and most private plans when medically necessary |
| Medicare beneficiary out-of-pocket | A few hundred to a few thousand dollars | Part A deductible plus Part B coinsurance; Medigap covers most or all |
| Private insurance out-of-pocket | Up to the plan’s annual out-of-pocket maximum (often $8,000 to $9,450 in 2026) | Depends on deductible, coinsurance, and network |
| Uninsured billed charges | Highest; financial assistance strongly advised | Not covered up front; hospital assistance and payment plans available |
| Cost drivers | Number of grafts, on-pump vs off-pump, ICU and hospital days, complications | Emergency CABG typically costs more than planned surgery |
What Drives the Cost of Heart Bypass Surgery
- Number of grafts: A triple or quadruple bypass involves more work than a single or double.
- On-pump vs off-pump: Using a heart-lung machine and the surgical approach affect cost.
- Hospital and ICU stay: CABG usually involves several days in the hospital, including intensive care.
- Planned vs emergency: Emergency bypass after a heart attack generally costs more.
- Complications: Longer stays or added procedures raise the total.
Medicare Coverage
Medicare covers medically necessary CABG. Part A covers the inpatient hospital stay (subject to the benefit-period deductible), and Part B covers the surgeon and related services with 20 percent coinsurance after the deductible. Beneficiaries with a Medigap plan often pay very little beyond the Part A deductible. Medicare Advantage plans must cover CABG but have their own cost-sharing.
Private Insurance and Uninsured Options
Commercial plans cover medically necessary CABG; your share depends on your deductible, coinsurance, and out-of-pocket maximum, which caps your yearly spending. Uninsured patients face the highest sticker prices but should ask about hospital financial assistance, charity care, and payment plans, and request a good-faith estimate under the No Surprises Act.
Frequently Asked Questions
How much does heart bypass surgery cost in the US?
Billed costs typically range from about $40,000 to $150,000 or more depending on the number of grafts, hospital stay, and complications. With insurance, most patients pay up to their plan’s out-of-pocket maximum.
Does Medicare cover CABG?
Yes. Medicare covers medically necessary bypass surgery under Part A (hospital) and Part B (surgeon). Beneficiaries with Medigap often pay very little.
Why is bypass surgery so expensive?
It is a major open-heart operation with a surgical team, a heart-lung machine in many cases, several hospital and ICU days, and close follow-up, all of which add to the billed cost.
What if I cannot afford it?
Nonprofit hospitals must offer financial assistance, and payment plans and charity care are commonly available. Ask the billing office and request a good-faith estimate.
Related Reading on Know Your Surgery
- CABG: Overview and Symptoms
- CABG: Treatment, Prevention, and Management
- CABG: FAQs, Statistics, and Case Studies
See how this compares with other procedures in our US Surgery Cost Index.
Sources
- Centers for Medicare and Medicaid Services (CMS). Coverage of inpatient cardiac surgery. https://www.medicare.gov/
- American Heart Association (AHA). Cardiac procedures and surgeries. https://www.heart.org/en/health-topics/heart-attack/treatment-of-a-heart-attack/cardiac-procedures-and-surgeries
- Society of Thoracic Surgeons (STS). Cardiac surgery patient information. https://ctsurgerypatients.org
- US No Surprises Act. Good-faith estimate rights. https://www.cms.gov/nosurprises
Medical Disclaimer
This article is for general education and reflects typical 2026 US ranges, which vary widely by hospital, region, and case complexity. Verify costs with your hospital and insurance plan. This article is not medical or financial advice.
