New Census Estimates Show 3 Million More Americans Had Health Insurance Coverage in 2012. Appendix: Methods for Assigning Primary Source of Coverage

11/01/2013

To assign persons for whom more than one source of coverage is reported in the CPS-ASEC to the single, “primary” source of coverage shown in Figure 3 and Table 2, we created a hierarchy.  Because Medicare is considered to provide primary coverage for Medicare-Medicaid dual enrollees, we placed Medicare at the top of the hierarchy.  Everyone who reported Medicare (alone or in combination with other sources of coverage), is thus assigned as Medicare, and the Medicare “Any” and “Primary/Only” estimates in Table 3 are the same.  Next, we assigned anyone not reporting Medicare, but reporting Military coverage, as Military.  We then assigned persons not reporting Medicare or Military, and reporting Medicaid or CHIP, as Medicaid/CHIP.  Persons not reporting Medicare, Military, or Medicaid/CHIP, but reporting either Employer-Sponsored coverage or coverage from outside the household (which we assumed was Employer-Sponsored coverage) were assigned as Employer-Sponsored.  Direct purchase was at the bottom of the hierarchy, so the only people for whom Direct Purchase was assigned as primary were those who did not report any of the other types of coverage.

The particular hierarchy we developed did not affect estimates for those reporting only one source of coverage, or for those reporting as uninsured.

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