Best hospitals for heart bypass surgery: An evidence-based review of rankings and outcomes

Best hospitals for heart bypass surgery are identified through several different measures rather than one universal standard. Current published data highlights major referral centers such as Mayo Clinic, Massachusetts General Hospital, Cleveland Clinic, NYU Langone, and Johns Hopkins, while outcome reports also identify programs with strong CABG survival, readmission, or Society of Thoracic Surgeons performance. 1

How cardiac hospital rankings are constructed

Newsweek’s 2026 specialized-care evaluation describes cardiac rankings as a review of clinical performance, patient outcomes, and expert input. Its cardiac-care category includes hospitals treating coronary artery disease, chronic ischemic heart disease, coronary angioplasty and stent placement, heart bypass surgery, valve disease, and heart transplantation. The ranking therefore measures broad cardiovascular capability, not CABG results alone. A hospital’s position should be interpreted as an indicator of overall cardiac capacity rather than a guarantee of an individual surgical outcome. 1

Hospitals appearing prominently in current data

Newsweek’s 2026 cardiac-care ranking places Mayo Clinic in Rochester first, Massachusetts General Hospital and its Corrigan Minehan Heart Center second, Cleveland Clinic third, NYU Langone Hospital Tisch fourth, and Johns Hopkins Hospital fifth. All five are identified for CABG as well as coronary artery disease and other advanced cardiac services. A separate U.S. News ranking reported by Becker’s places NYU Langone Hospitals first with a score of 97.5, followed by NewYork-Presbyterian at 89.9, Mayo Clinic at 83.3, and Cedars-Sinai at 83.1. 1 2

What coronary bypass surgery involves

Coronary artery bypass grafting, or CABG, diverts blood around blocked coronary vessels to improve blood flow and heart function. Penn Medicine states that candidacy depends on the cardiovascular condition, symptom severity, plaque location, cardiovascular testing, and stress-test results. Mild coronary disease may instead be managed with lifestyle changes, medication, or angioplasty, while CABG may be considered when those approaches are ineffective or during emergencies involving a threatened heart attack. 3

Traditional CABG is open-heart surgery in which surgeons access the heart through a chest incision and may stop the heart during the operation. Penn Medicine also describes minimally invasive approaches, including smaller-incision procedures, robotic-assisted surgery, and off-pump surgery in which the heart does not need to be stopped. The existence of several techniques does not mean every patient qualifies for every approach. Anatomy, disease severity, test results, and the treating surgical team’s assessment remain central to procedure selection. 3

Outcome measures beyond national rank

Procedure-specific outcomes can provide information that broad rankings do not. Cleveland Clinic reported 2025 isolated CABG volume of 969 cases, observed operative mortality of 0.8%, and an STS-expected mortality of 1.6%. The same report recorded 213 combined aortic valve replacement and CABG procedures, with observed mortality of 1.9% compared with an expected 3.4%. These figures apply to the reported populations and should not be treated as a prediction for a particular patient. 4

CMS also publishes CABG readmission measures through its Hospital Readmissions Reduction Program. In data covering July 1, 2021, through June 30, 2024, Sarasota Memorial Hospital and Christus Mother Frances Hospital recorded an excess readmission ratio of 0.74, while Cleveland Clinic recorded 0.75, NYU Langone 0.76, and Massachusetts General Hospital 0.79. The ratio compares predicted readmissions with the expected rate for hospitals treating similar patient populations. 5

Why STS ratings matter

The Society of Thoracic Surgeons uses benchmarked surgical outcomes to assign star ratings to participating cardiac programs. Ascension Saint Thomas Heart reported a three-star rating, the highest STS designation, for CABG and combined aortic valve replacement with bypass. Its announcement states that the combined procedure distinction was earned by 3.8% of participating programs, while the CABG three-star rating was achieved by 22% of hospitals nationwide in the cited analysis. 7

• Assess whether the rating covers isolated CABG or a combined procedure.
• Check the time period of the underlying STS analysis.
• Distinguish a three-star surgical rating from a broad hospital ranking.
• Ask whether the program routinely treats the patient’s specific level of complexity.

Lankenau Medical Center also reported three-star STS results in isolated CABG, isolated aortic valve replacement, mitral valve procedures, and its multiprocedural category. Its cited analysis covered July 1, 2022, through June 30, 2025, and included 941 participating programs, with 29% receiving three stars for the multiprocedural composite measure. These figures demonstrate why the reporting period and category matter when comparing hospitals. 8

Eligibility, risks, and practical comparison points

Hospital selection involves more than a national position. CABG eligibility is individualized, and published rankings combine different procedures, patient populations, and scoring systems. Becker’s report says the 2026 U.S. News cardiology ranking evaluated nearly 500 hospitals after an eligibility process involving minimum procedure volumes and a transfer-pattern check. Survival represented 45% of the score, with the remainder divided among discharge-to-home rates, readmission prevention, and patient experience. 2

• Review CABG-specific mortality, complications, and readmission information.
• Confirm whether reported numbers cover isolated bypass or combined surgery.
• Compare the reporting dates because outcomes change over time.
• Discuss disease anatomy, test results, alternatives, and operative approach with qualified clinicians.
• Account for travel, referral patterns, and continuity of care after discharge.

Deborah Heart and Lung Center received a U.S. News “High Performing” designation for heart bypass surgery, heart arrhythmia, heart failure, and COPD in the cited 2026-2027 procedures and conditions ratings. That designation indicates strong performance in a specific evaluated category, but it is not identical to an overall cardiac-care rank or an STS star rating. Comparing these distinctions carefully reduces the risk of treating different quality measures as interchangeable. 9

Interpreting quality data responsibly

Public quality data is useful but has limits. Rankings may emphasize referral strength, expert input, patient experience, or multiple cardiac conditions, while surgical databases focus more narrowly on operative outcomes. CMS readmission ratios are adjusted for similar patient populations, and STS ratings are based on participating programs and defined reporting periods. No single metric captures every risk, including the complexity of a case, urgency of surgery, or suitability of a particular technique. 2 5 7

A balanced review should therefore combine broad institutional standing with procedure-specific evidence and an individualized clinical assessment. High procedure volume can make a hospital a major referral center, but volume alone does not establish that one program is appropriate for every patient. The most relevant comparison is the quality of care for the diagnosed condition, the surgeon’s experience with the required operation, expected risks, alternatives, and plans for recovery and follow-up. 1 3

Sources

1. Newsweek, America’s Best Hospitals for Specialized Care 2026: Cardiac Care
2. Becker’s Cardiology, 50 best hospitals for cardiology, heart and vascular surgery
3. Penn Medicine, Coronary Artery Bypass Graft
4. Cleveland Clinic, Vital Statistics in Adult Cardiac Surgery
5. Becker’s Cardiology, Hospitals with the highest and lowest coronary bypass readmission rates
6. Premier and Modern Healthcare, 50 Top Cardiovascular Hospitals program
7. Ascension Saint Thomas Heart, STS recognition for heart surgery
8. Main Line Health, Lankenau Medical Center STS cardiac surgery rating
9. Deborah Heart and Lung Center, U.S. News high-performing ratings