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Variable: EFIVEPCT

Enhanced Medicare 5% Sample Indicator

Description

This variable indicates whether the beneficiary was ever included in the CCW 5% sample for any year (1999+).

Comment

This enhanced 5% sample is broader than the annual 5% sample (variable called FIVE_PERCENT_FLAG) because it includes all beneficiaries who were ever part of the 5% sample but had a HIC change that was not part of the sample. The "enhanced" indicator variable allows for longitudinal study of the 5% sample (i.e., once in, always in). CCW creates the 5% sample using standard CMS processes. The 5% random sample consists of people who had a Medicare beneficiary Health Insurance Claim number (HIC) equal to the Claim Account Number (CAN) plus Beneficiary Identity Code (BIC) (HIC=CAN+BIC) where the last two digits of the CAN are in the set {05, 20, 45, 70, 95}.

Values

This variable is coded, and will contain one of the following values.

Values for
Value Description
Y Yes, included in enhanced 5% sample
Null Not included in enhanced 5% sample

Other Info

Some additional information on this variable:

  • Short Name: EFIVEPCT
  • Long Name: ENHANCED_FIVE_PERCENT_FLAG
  • Type: CHAR
  • Length: 1
  • Source: CCW (derived)
  • Value Format:

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