Cincinnati-based UC Health was downgraded on a series of bonds, Moody's said May 10.
The move, which involved a lowering from a "Baa2" to "Baa3" grade, refers to such bonds with an overall value of $580 million.
In February, UC Health suffered a similar downgrade from "A" to "BBB+" on its overall rating and on some bonds because of what S&P Global termed "significantly escalating losses."