We found that 17.7 percent of claims were denied … that 60 percent of all denied claims were resubmitted, with two-thirds of resubmitted denials being overturned…. Overturned denials constituted 56.6 percent of original denials, as a dollar share of billings. Providers therefore ended up losing 7.2 percent of the total dollars they initially billed for….
Even after we factored in denials that were overturned, net denial rates … were 8.0 percent for non-inpatient institutional compared with 7.0 percent for inpatient and physician services.
Source: Health Affairs