S&P Global Ratings raised the rating to "AA-" from "A+" on Minneapolis-based Children's Hospitals and Clinics of Minnesota's series 2010A, 2004A, 2004B, 2007A, 1995A and 2004A-1 bonds.
"The rating action reflects our view of [the system's] strengthening enterprise profile, solid operating performance that has been sustained for the past few years, healthy debt service coverage and decreasing debt levels," said S&P analyst Suzie Desai.
The outlook is stable, reflecting S&P's view of the system's robust presence in the TwinCities, growing regional presence and sustained improvement in operations.
More hospital outlook and credit rating actions:
Fitch affirms Berkshire Health Systems' 'A-' rating
Moody's downgrades Adventist HealthCare's rating to 'Baa3'
Moody's assigns 'Aa3' rating to Cedars-Sinai Medical Center's bonds