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Plan 1: Paid for by Medicaid

Codes and Frequencies

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For persons who have a private insurance plan, this variable indicates the person's first plan was paid for by Medicaid.

Information was collected on up to four plans per family; for 2004 forward, only data on the first and second plan are publicly available. Uses may also want to see the variables HIP1CAID, HIP3CAID, and HIP4CAID. Users may also want to see the variable description for HIPCAIDR, a recoded variable created by the IPUMS NHIS staff, which indicates if the respondent had any private plan paid for by Medicaid.

Private insurance companies are allowed to administer portions of Medicaid benefits through Medicaid managed care arrangements in which health maintenance organizations contract directly with a state Medicaid agency to provide services on a capitated basis (fixed fee per enrollee). These managed care plans then enroll and provide services for Medicaid beneficiaries. For example the Centers for Medicare and Medicaid Services (CMS) provided a listing of insurance plans contracting with Medicaid in each state in a 2009 report entitled, "2009 National Summary of State Medicaid Managed Care Programs." Users may want to review other documents on the CMS website for further information on such payment arrangements.

HIP1CAID was edited by the NCHS. Responses were edited based on the plan name to improve accuracy.


To clarify, during the course of data editing, the NCHS discovered errors in the responses to questions about insurance coverage. This might be shown, for example, by a mismatch between the verbatim name of an insurance plan and the type of insurance coverage the person selected from the categories on the card. Relevant to HIP1CAID, only respondents verified to have private insurance are included in the data for HIP1CAID. A full description of the editing that occurred is provided under the variable descriptions for HIPRIVATEE.


This variable is mostly comparable over time. As new forms of plan payment and public insurance programs became available, slight changes were made to the response categories. For all years, the categories of self or family (living in the household), employer or union, someone outside the household, Medicare, and Medicaid were available. For 1999 forward, respondents could report the category Children's Health Insurance Program. From 1998 forward, the category, "state or local government or community program" was used in place of the 1997 category of "government program."

Information was collected on up to four plans per family; for 2004 forward, only data for the first and second plan are publicly available. However analysis by IHIS staff found very few individuals had more than 2 private insurance plans (less than 0.2 percent of the total number of individuals with private health insurance each year for 2004 to 2009).

As noted in the variable description, the variables for 1997 forward have been edited by the NCHS to improve accuracy of the type of insurance the respondent had (private, Medicaid, SCHIP, Military, etc.). This reduces comparability with variables with earlier years.


  • 1997-2013; 2014 2015 2016 2017 2018: All persons with a private health insurance plan.


  • 1997-2018