NEW YORK (Standard&Poor's) Feb. 16, 2016--Standard&Poor's Ratings Services said today that its ratings on Community Health Systems Inc., including the 'B+' corporate credit rating, are unaffected by the company's relatively weak earnings report for the fourth quarter of 2015. The company's reported results, including a $169 million increase in its allowance for doubtful accounts, are below our expectations but we think some of it is one time in nature and have adjusted its results. Using the adjusted EBITDA, results are just slightly below our projections. Moreover, cash flow is also weaker than we expected, partly as a result of the timing of some working capital; which we expect to reverse in 2016. At this time, we