Does Enrollment in Generic-Tier Zero-Copay Plans Improve Generic Use Within the Part D Program?
Guidance for determination of the availability of generic-tier $0 copays among plans, and the effect of generic-tier $0 copays on generic substitution rates within the low income subsidy (LIS) and non-LIS populations
Final
Issued by: Centers for Medicare & Medicaid Services (CMS)
Issue Date: December 29, 2015
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