S&P Global Ratings assigned its "AA" rating to Rochester, Minn.-based Mayo Clinic's $200 million series 2018 revenue bonds.
Concurrently, the credit agency affirmed its "AA" long-term rating on Mayo Clinic's outstanding debt.
The rating affirmation and assignment are based on several factors, including the health system's dominant market position, global reputation, solid financial profile and diverse operating assets.
The outlook is stable, reflecting S&P's expectation that Mayo Clinic's stellar enterprise profile will be maintained to improve margins.