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This variable is contained in the following files:
SAS Name
PTD_EVENTS
This variable is the count of events for Part D drugs for a given year (i.e., a unique count of the PDE_IDs). An event is a dispensed (filled) drug prescription that appears in the Prescription Drug Event (PDE) file.
Null/missing or 1-XXXX
The value will be null if the beneficiary was not enrolled in Part D or did not use any Part D drugs during the year.
PDEs consist of highly variable days supply of the medication. We also create a derived variable that counts a standard 30 day supply of a filled Part D prescription (see PTD_FILL_CNT).
Source: CCW (derived)