In a fully insured plan, the carrier owns the claims data. Employers typically receive summary reports, aggregate cost figures, and high-level utilization statistics. What they do not receive is the granular, transaction-level claims data that would allow them to identify specific cost drivers, evaluate individual service categories, or understand the health patterns developing within their workforce population.
The carrier has that data. It informs their underwriting, their renewal pricing, and their risk assessment. The employer, whose workforce generated that data, is working from a much smaller window into their own plan. That asymmetry of information consistently disadvantages employers at renewal time and makes proactive plan management nearly impossible.