The Orange County Register reporters rated the quality of care at 26 acute care hospitals in Orange County using a four-star system. They then compared the hospital's quality to the average prices they charged for care. The major findings were: "1) the best hospitals charged less per day than the county average and less than many of the lower rated hospitals. 2) all four of the top-rated hospitals were not-for-profit and all four of the lowest-rated hospitals were for-profit. 3) Tenet Healthcare Corp., the largest hospital operator in Orange county -- and second largest in the U.S. -- had mediocre quality at the highest prices in the county."