The Scope of the ProblemKey Statistics:45% of insured working-age Americans received recent medical bills or charges that should have been covered by their insurance. of insured working-age Americans received recent medical bills or charges that should have been covered by their insurance. Over 50% of people who didn’t challenge medical billing errors were unaware of their right to do so. More than 40% of adults reported having some medical debt, with over 10% owing $10,000 or more in unpaid medical bills. Challenge Billing Errors and Denied CoverageDon’t hesitate to contest medical billing errors or denied coverage.