Description: This discussion is on the availability of utilization and cost experience data for group medical care insurance coverages. Specifically, it highlights the role of the Society of Actuaries in intercompany data collection, employer demands for sophisticated utilization data for comparison by industry and geographic location, sources of industry-wide data, data resource potential of health claims processing by the National Electronic Information Corporation, and antitrust implications. From Record of the Society of Actuaries 1981, Volume 7, No. 4.