This graph depicts cost-sharing for generic and brand name drugs (including biologics) in the Medicare Part D coverage gap in the U.S. in 2019. During this year, those enrolled in Medicare Part D had a 25 percent co-payment for brand name drugs and biologics in the coverage gap, compared to 37 percent for generic drugs.
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Cost-sharing for generic and brand name drugs in the Medicare Part D coverage gap in 2019
Drug type
Plan
Enrollee
Manufacturer
Generic
63%
37%
-
Brand Name and biologics
70%
25%
5%
0%25%50%75%100%125%
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Amgen. (May 30, 2019). Cost-sharing for generic and brand name drugs in the Medicare Part D coverage gap in 2019 [Graph]. In Statista. Retrieved June 26, 2025, from https://www.statista.com/statistics/1088428/cost-sharing-generic-and-brand-drugs-medicare-part-d-coverage-gap-us/
Amgen. "Cost-sharing for generic and brand name drugs in the Medicare Part D coverage gap in 2019." Chart. May 30, 2019. Statista. Accessed June 26, 2025. https://www.statista.com/statistics/1088428/cost-sharing-generic-and-brand-drugs-medicare-part-d-coverage-gap-us/
Amgen. (2019). Cost-sharing for generic and brand name drugs in the Medicare Part D coverage gap in 2019. Statista. Statista Inc.. Accessed: June 26, 2025. https://www.statista.com/statistics/1088428/cost-sharing-generic-and-brand-drugs-medicare-part-d-coverage-gap-us/
Amgen. "Cost-sharing for Generic and Brand Name Drugs in The Medicare Part D Coverage Gap in 2019." Statista, Statista Inc., 30 May 2019, https://www.statista.com/statistics/1088428/cost-sharing-generic-and-brand-drugs-medicare-part-d-coverage-gap-us/
Amgen, Cost-sharing for generic and brand name drugs in the Medicare Part D coverage gap in 2019 Statista, https://www.statista.com/statistics/1088428/cost-sharing-generic-and-brand-drugs-medicare-part-d-coverage-gap-us/ (last visited June 26, 2025)
Cost-sharing for generic and brand name drugs in the Medicare Part D coverage gap in 2019 [Graph], Amgen, May 30, 2019. [Online]. Available: https://www.statista.com/statistics/1088428/cost-sharing-generic-and-brand-drugs-medicare-part-d-coverage-gap-us/
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