PARSIPPANY, N.J.--(BUSINESS WIRE)--One Call Medical (OCM), the nation’s leading provider of diagnostic testing (including MRI and CT scans) and specialty services (e.g. transportation and translation), today announced findings from its Diagnostic Management Program, revealing that on average, a typical workers’ compensation payer may have as much as two-thirds of its diagnostic radiology referrals go “unmanaged,” leading to overpayments, inefficiencies, and quality issues in the diagnostic referral, scheduling, and results process.