...The assignment of a 'AA¡' Issuer Default Rating (IDR) to Yale New Haven Health System (YNHHS) is related to Fitch Ratings' January 2018 update of its "U.S. Not-For-Profit Hospitals and Health Systems Rating Criteria." The affirmation of YNHHS's existing rated debt at 'AA¡' is based on its continued strong operating results and balance sheet growth. The 'AA¡' long-term rating also reflects YNHHS's consistent operations, solid liquidity growth and improving financial profile. Fitch expects that both net adjusted debt to adjusted EBITDA and cash to adjusted debt will remain solidly in the 'AA' category through the five-year look- forward period....