Of the only claims that have been adjudicated 90% were found to have been erroneous.
Without analysis there is no particular reason to believe that other denials were more justified.
Few doctors on average make nonsensical requests for patient care while insurers issue spurious denials as a matter of course.
You dont need to know the total number of denials instead you need a neutral party to analyze a random sample of denials.
We could do this as matter of course and tie failing an adequate benchmark to ruinous penalties to company and CEO.