 The MarketScan data warehouse, a family of databases, contains individual-level healthcare claims information from large employers, managed care organizations, Medicare, and Medicaid programs. This white paper describes the features and research uses of MarketScan data.imitations of the data. As with any data source, MarketScan data have limitations. Some of these have to do with the nature of claims data, and others with the nature of the MarketScan sample population. Key limitations include the following:• MarketScan is based on a large convenience sample.