S&P Global Ratings affirmed the "A-" rating on New York City-based Mount Sinai Hospital Obligated Group's series 2010A and 2011A bonds, affecting $315.4 million in debt.
The outlook was revised to stable from negative.
"The outlook revision to stable reflects strong and improving financial performance at the system's flagship MSH facility in fiscal 2016 and the current year to date," said Martin Arrick, an S&P Global Ratings credit analyst.
The stable outlook reflects S&P's expectation that Mount Sinai Hospital's financial performance will continue to improve and balance sheet metrics will stabilize even though the transition risks are still eminent.