Arroyo Grande Community Hospital; French Hospital Medical Center and Sierra Vista Regional Medical Center in San Luis Obispo; Twin Cities Community Hospital in Templeton; and Marian Medical Center in Santa Maria all received a top grade.
The hospitals also received "A" ratings last year.
Leapfrog, a nonprofit healthcare watchdog, used 28 measures to give grades of A, B, C, D or F to 2,522 general hospitals nationwide on ability to prevent errors, injuries and infections.
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Of the total, 804 hospitals received an A, 668 earned a B, 878 earned a C, 150 earned a D and 22 earned an F, according to Leapfrog. Nationwide, hospital safety performance had improved from 2012, mostly due to changes in practices such as better hand-washing, training for nurses, improved staffing levels, and use of the correct antibiotics before surgery.
To score hospitals, Leapfrog uses data from a hospital survey, the federal Agency for Healthcare Research and Quality, the Centers for Disease Control and Prevention, and the Centers for Medicare and Medicaid Services.
To view the Hospital Safety Score report, go to www.hospitalsafetyscore.org.