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Accession Number PB2014-100420
Title Social Security Numbers in Medicaid Records: Reporting and Validity, 2009.
Publication Date Jan 2012
Media Count 63p
Personal Author J. L. Czajka S. Verghese
Abstract The Medicaid records that states submit to the Centers for Medicare & Medicaid Services (CMS) through the Medicaid Statistical Information System (MSIS) do not contain names and addresses, but they do contain Social Security numbers (SSNs). And, any attempt to link MSIS recordsor the research data developed from MSIS recordsto other databases must rely almost exclusively on these SSNs. The effectiveness of these linkages and the validity of any research based on these linked data are directly dependent on the quality of the SSNs recorded in the MSIS files. Previous research with Medicaid enrollment data has documented how often SSNs are actually present in Medicaid records and how often the reported SSNs pass basic range checks. These studies have not been able to go the additional step of determining how often the SSNs that pass range checks also pass tests of validity at the individual level. In this study, we address that limitation, using data assembled by the Census Bureau to assess the validity of reported SSNs in recent MSIS data by age group and state of residence. This final report presents integrated findings on both the reporting and validity of MSIS SSNs at the state and national levels. In our examination of SSN reporting at the national level, we defined the following three outcomes that can be discerned with MSIS data: (1) a reported SSN falls within the broad range of SSNs assigned by the Social Security Administration (SSA), (2) a reported SSN falls outside the valid range, or (3) no SSN is reported. Out of 55.0 million Medicaid enrollees during the fourth quarter of federal fiscal year (FY) 2009, the most recent quarter with complete data for all states, 50.8 million or 92.30 percent had SSNs that fell within the valid range. Another 13,000 or 0.02 percent had SSNs that fell outside the valid range, and 4.2 million or 7.68 percent had missing SSNs.
Keywords Availability
Federal age
Identify theft
Local government
National government
Public access
Public records
Records management
Social security numbers
State government

Source Agency Health Care Financing Administration Policy Planning Researc
NTIS Subject Category 44B - Agency Administrative & Financial Management
44K - Health Services
70B - Management Practice
70F - Public Administration & Government
Corporate Author Mathematica Policy Research, Inc., Washington, DC.
Document Type Technical report
Title Note Final rept.
NTIS Issue Number 1401
Contract Number HHSM-500-2005-00025I

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