...BOSTON (S&P Global Ratings) May 9, 2017--S&P Global Ratings today affirmed its '##-' issue-level rating on acute-care hospital operator Community Health Systems Inc.'s senior secured debt on news that subsidiary CHS/Community Health Systems Inc. is issuing a $700 million tack on to its senior secured notes due 2023 to repay its term loan A. The recovery rating on this debt remains '1', including our expectation for very high (90%-100%, rounded estimate: 90%) recovery to lenders in the event of payment default. At the same time, we affirmed '###+' issue-level rating on subsidiary CHS/Community Health Systems Inc.'s unsecured debt. The recovery rating on this debt remains '6', indicating our expectations for negligible (0%-10%, rounded estimate: 0%) recovery on this debt in the event of default. Concurrently, the company is also seeking to extend $750 million of its revolving credit facility to 2021 from 2019. Our 'B' corporate credit rating on Community is unchanged. The rating outlook remains...