What Are We Measuring?

Coronary artery bypass grafting (CABG) is a type of surgery that improves blood flow to the heart. Surgeons use CABG to treat people who have severe coronary heart disease, a disease in which a substance called plaque builds up inside the coronary arteries.

The Centers for Medicare and Medicaid Services (CMS) evaluates 30-day mortality and readmission rates for patients who have CABG surgery:

  • 30 Day Mortality Rate: the percentage of CABG patients who died within 30 days of admission to the hospital
  • 30 Day Readmission Rate: the percentage of CABG patients who were discharged from the hospital and were readmitted to any hospital for any reason in the next 30 days

How We Are Performing?

CABG 30-Day Mortality Rate

Lower scores are better

The following chart shows the CABG 30-Day Mortality Rate from July 2016 to June 2019. 1.8% is the Mass General rate. 3% is the national rate. The equal symbol indicates that performance is statistically similar to the benchmark.
Data Source: CMS Hospital Compare
Data Period: July 2016 - June 2019

   ★ Performance is statistically better than the benchmark
= Performance is statistically similar to the benchmark
   ▼ Performance is statistically worse than the benchmark

CABG 30-Day Readmission Rate

Lower scores are better

The following chart shows the CABG 30-Day Readmission Rate from July 2016 to June 2019. 11.8% is the Mass General rate. 12.7% is the national rate. The equal symbol indicates that performance is statistically similar to the benchmark.
Data Source: Hospital Compare
Data Period: July 2016 - June 2019

   ★ Performance is statistically better than the benchmark
= Performance is statistically similar to the benchmark
   ▼ Performance is statistically worse than the benchmark