Healthesystems: In workers’ compensation, a small group of claims cost in excess of $1 billion each year. These “mega claims” represent less than 0.1% of total
workers’ comp claims but account for over 2% of total loss dollars...

You can read the full article here.  It cites three WCRI studies: Degenerative and Comorbid Conditions in Workers’ Compensation, Factors Associated with High-Cost Claims, and The Impact of Opioid Prescriptions on Duration of Temporary Disability.  Visit their pages on our website for more information, including details on how to get copies!