NAME TYPE LENGTH ------------------------------------- ------ CMS 5% SAMPLE FLAG CHAR 1 A flag indicating whether the beneficiary was included in the CMS 5% Denominator File for the reference year. This flag distinguishes between the beneficiaries that are part of the CMS annual 5% and those that are included as part of the ever-enrolled Chronic Condition Warehouse (previously or subsequently a part of the CMS annual 5%, but not for the reference year). The presence of this flag allows researchers to extrapolate data from the 5% sample. SHORT NAME: FIVEPCT LONG NAME: FIVE_PERCENT_FLAG CODES: Y = Included in CMS strict 5% sample (5% Denominator File) Null = Not included in CMS strict 5% sample (5% Denominator File)