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Coronary Artery Bypass Graft: Hospital Performance Ratings, 2020

123 state-licensed hospitals performed adult CABG surgery during 2019-2020. The statewide isolated CABG mortality rate for 2020 was 2.64 percent.

Coronary Artery Bypass Graft (CABG) surgery outcomes reports are based on data collected by HCAI’s California CABG Outcomes Reporting Program. The reports and visualizations provide quality ratings for the state-licensed hospitals that perform coronary artery bypass graft (CABG) surgery. During 2019-2020, 123 state-licensed hospitals performed adult CABG surgery.

The performance ratings are based on four key risk-adjusted outcomes: operative mortality for isolated CABG, operative mortality for CABG + Valve, post-operative stroke, and isolated CABG 30-day readmission. 

Key Findings

  • The statewide isolated CABG mortality rate for 2020 was 2.64 percent. This is a significant increase from the 2019 mortality rate of 2.19 percent, but represents a decrease of 9.3 percent since 2003, the first year of mandated reporting.
  • The operative mortality rate for CABG + Valve surgery in California was 5.56 percent in 2019-2020. This rate was higher than the 2018-2019 rate of 5.17 percent.
  • The post-operative stroke rate for isolated CABG surgery in California was 1.59 percent in 2019-2020. This represents a 5.9 percent decrease in California’s average post-operative stroke rate from 2018-2019 of 1.69 percent. This represents a 11.2 percent increase though since 2007-2008 when the rate was 1.43 percent.
  • The statewide hospital all-cause unplanned 30-day readmission rate was 11.77 percent for those who underwent isolated CABG surgery in 2019-2020. This rate is lower than the 2018-2019 rate of 12.15 percent.
  • There is no consensus on an optimal usage rate for internal mammary artery (IMA), so performance ratings are not given. IMA usage rate was at or above 90 percent for all hospitals with an average usage rate of 99.35 percent in 2020, 98.37 percent in 2019, and 89.56 percent in 2003.
View the Hospital Results PDF
View Underlying Data

Understanding the Data

This diagram explains how hospital performance is depicted in the visualization.

Key showing hospital performance ratings for CABG surgeries

Data and Resources

Additional Information

Topic: Healthcare Quality
Source Link: Coronary Artery Bypass Graft Reports
Citation: HCAI – California Hospital Performance Ratings for Coronary Artery Bypass Graft (CABG) Surgery, 2019-2020
Temporal Coverage: 2019-2020
Spatial/Geographic Coverage: Statewide
Frequency: Annual
Related Resources: The Society of Thoracic Surgeons. This information is provided as a courtesy. The state does not control any third-party web services or any of the material on third-party sites. It does not imply approval or endorsement of the organization represented by the website or the website content.