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This variable is contained in the following files: Part D Drug Event File
Short SAS Name
SAS Name

The unique CCW identifier for a beneficiary.

The CCW assigns a unique beneficiary identification number to each individual who receives Medicare and/or Medicaid, and uses that number to identify an individual’s records in all CCW data files (e.g., Medicare claims, MAX claims, MDS assessment data).

This number does not change during a beneficiary’s lifetime and each number is used only once.

The BENE_ID is specific to the CCW and is not applicable to any other identification system or data source.


Source: CCW

External Resources

For details of the beneficiary identification number, BENE_ID, please see Chapter 7 of the CCW Medicare Administrative Data User Guide . Additional details for the assignment of a BENE_ID in the CMS Medicaid data can be found in Chapter 1 of the CCW MAX User Guide.