Results Of CMS’s Updated Hospital Quality Evaluation Formula

The number of top-rated hospitals in the US quadrupled—from 83 to 337—after the US Centers for Medicare and Medicaid Services (CMS) revised the methodology behind its Hospital Quality Star Rating system. At the same time, twice as many hospitals landed on the low end of the ratings spectrum. Under CMS’s original ratings formula, just six (1 percent) large US hospitals received a 5-star rating in July 2016 compared with 48 (11 percent) under the new methodology. More small hospitals also have a 5-star rating—121 small hospitals (9 percent) compared with 51 (4 percent) in 2016.  

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