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This variable is contained in the following files: Part D Drug Event File, Plan Characteristics File, Part D Formulary File
SAS Name
FORMULARY_ID

This variable is the unique identification number assigned to each formulary. Part D plans submit their formularies to CMS and identify the drug products that are covered using the National Library of Medicine’s RxNorm Concept Unique Identifiers (RXCUIs).

This field is a key that links of Part D sponsor's formulary file to their contract and plan identifiers.

Comments

The same formulary may be used by more than one plan benefit package (PBP; variable
called PLAN_ID) within a contract.

The CCW constructs a Formulary Characteristics File from the CMS Approved Formulary
Data found in the CMS’s Health Plan Management System (HPMS).

Source: CMS (HPMS Files)

8-digit numeric value