I had a good one from Cleveland Clinic awhile back, had a great yield, like 5.25% tax-exempt. I think I picked it up during the "taper tantrum" around 2013-2014. It was called a year or two ago.
My current hosp bonds are from Aurora (now Advocate-Aurora) Health Care, 3.5% rated Aa3, will probably be called in a year; ProHealth of Waukesha County, Wis., rated A+/A1, 4.25% and 5%. ProHealth and Aurora are competitors in the affluent suburbs around Milwaukee. Aurora is the bigger group; it recently merged with a hospital group in northern Illinois to create the ninth-largest hospital system in the US.
This spring I picked up a bond from ThedaCare, a prominent hospital network in Wisconsin's Fox River Valley, during the muni panic. Rated A1, 5% yield, call date in 12/24. I've got one more little hospital bond for $5K from the Marshfield (Wis.) Clinic group. It's only rated A-, but at 4.5% yield I expect it to be called in February 2022. They're a pretty important health care hub in north-central Wisconsin, but they have had some financial ups and downs in the last 20 years. I wouldn't want to hold any of their long-term paper.