Estimating the Number of Individuals in the U.S. Without Health Insurance. Adjusting for SCHIP

01/31/2005

In 1998, the State Children’s Health Insurance Program (SCHIP) was implemented, and since then has become a growing source of coverage for children. In March 2001, the CPS added a question to measure coverage under SCHIP.8 As with the verification question, the methodology mimicked the effect of the new SCHIP question as if it has been asked in 1999 and 2000, which was to lower Medicaid counts slightly (under a half million), trivially affect the uninsured. It should be noted that the SCHIP adjustment referred to here is not an “undercount” adjustment. SCHIP coverage was not imputed to levels found in the program itself, but was imputed to levels consistent with the amount found on the March 2001 and 2002 CPS files in order to mimic the effect of having the question present in the survey from the start of the SCHIP program. That is, given that the March 2001 CPS found approximately 80% of the actual SCHIP enrollment from CY 2000,9 we impute approximately 80% of SCHIP for CY 1999 and 1998 onto the March 2000 and March 1999 files.


From 2004 ASEC Questionnaire: “In (state) the (fill state CHIP program name) program (also) helps families get health insurance for CHILDREN. (Just to be sure,) Were any of the children in this household covered by that program?” READ IF NECESSARY: “(fill in state CHIP program name) is the name of the (state’s) CHIP program. It is the same as Children’s Health Insurance Program, which helps pay for children’s health care.”

SCHIP counts on the March 2001 CPS were 69% of program counts (CMS) for FFY00, and 87% of the December 2000 point in time count according to the Kaiser Family Foundation. An average of these was used to compute the target for March 2000 and March 1999, based on FFY99, FFY98, and Dec 1999 and Dec 1998 numbers.

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