What is the difference between the Vital Status file and the Denominator file?
The Vital Status file is a cumulative file that includes everyone that has ever been enrolled in Medicare. It contains only demographic information; it does not contain enrollment information. Each year, VIReC receives an annual update to the Vital Status file. This file is often used in death ascertainment, since it contains the most recent death dates available from Medicare. The Denominator file is an annual enrollment file that contains beneficiaries enrolled in Medicare at any time during the calendar year. It also contains demographics current as of the March following the close of the calendar year (For example, the 2000 Denominator will contain information as of March 2001).
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