C3858535_HL7V3.0

Comparison of results across strata can be used to show where disparities exist or where there is a need to expose differences in results. For example, Centers for Medicare & Medicaid Services (CMS) in the U.S. defines four required Supplemental Data Elements (payer, ethnicity, race, and gender), which are variables used to aggregate data into various subgroups. Additional supplemental data elements required for risk adjustment or other purposes of data aggregation can be included in the Supplemental Data Element section.