Bad debt expense increased 20 basis points to 2.2%, which Coltharp said was "primarily as a result of writing off claims from 2013 associated with a legacy audit appeal." Coltharp said the revenue increase was driven by both volume and pricing: discharge growth of 4.3% (including 1.6% same-store discharge growth) and a 3.7% increase in net revenue per discharge. He attributed net revenue per discharge growth to patient mix and a favorable comparison related to the annual Medicare Supplemental Security Incom ...