S&P Global Ratings assigned its "A+" rating to Portland-based MaineHealth's $110 million series 2018A and $75 million series 2018B revenue bonds.
Concurrently, S&P affirmed its "A+" long-term rating on MaineHealth's series 2014 bonds and affirmed its "A+" issuer credit rating.
"The rating reflects our expectation that MaineHealth's recently improving financial performance will continue through the outlook period as the rising margins and cash flow have generated balance sheet capacity to accommodate additional debt," said S&P credit analyst Cynthia Keller.
In addition, S&P acknowledged MaineHealth's strong enterprise profile, characterized by a dominant market share.
The outlook is stable, reflecting MaineHealth's leading market share and strong patient volume trends.