Not all Medicare Part D plans offer discounts on Yervoy, a medication used in cancer treatment. Yervoy is a biologic drug, and its availability and coverage may vary among different Part D plans. The drug is used to treat certain types of cancer and falls under Medicare Part B, which covers outpatient services, including some prescription drugs. The drug's coverage and cost-sharing may depend on the specific plan's formulary and cost-sharing structure. Patients are advised to review their plan's drug formulary or contact their plan directly to inquire about coverage and potential discounts for Yervoy under Medicare Part D.[1][2][3]

Sources:
[1] https://www.drugpatentwatch.com/p/biologics/tradename/YERVOY
[2] https://www.medicare.gov/Pubs/pdf/11931-Cancer-Treatment-Services.pdf
[3] https://aspe.hhs.gov/sites/default/files/private/pdf/264421/Part-B%2520Drugs-International-Issue-Brief.pdf