S&P has raised the long-term rating to "A" from "A-" on Pittsfield, Mass.-based Berkshire Health Systems' revenue debt issued by the Massachusetts Development Finance Agency.
The rating revision is based on several factors, including BHS' growing patient volume, dominant market share and healthy cashflow margins.
"The stable outlook reflects our view that BHS has maintained solid enterprise and financial profiles in recent years, in line with our expectations," said S&P credit analyst Jennifer Soule.
Though unlikely, a lower rating or negative outlook may be possible if BHS' net patient revenue declines or accumulates excessive debt.
More hospital outlook and credit rating actions:
Fitch upgrades Holy Redeemer Health System's bonds to 'BBB'
S&P assigns 'A-' rating to Nacogdoches County Hospital District's bonds
Moody's downgrades Good Samaritan Hospital's rating to 'Baa2'