Yervoy is a medication used for the treatment of certain types of cancer. To determine if Yervoy discounts are available for all Medicare plans, we can refer to the provided sources.

According to the information from the Drug Patent Watch website, Yervoy is a brand name for the drug ipilimumab. It is classified as a biologic drug, which is a type of medication derived from living organisms. Biologic drugs are typically more expensive than traditional pharmaceutical drugs.

The Medicare website provides a publication on cancer treatment services, which may offer insights into coverage and discounts for cancer medications like Yervoy. However, the provided link does not directly mention Yervoy or ipilimumab.

To get a broader understanding of Medicare coverage for Part B drugs, including biologics like Yervoy, we can refer to the issue brief published by the Assistant Secretary for Planning and Evaluation (ASPE). The brief highlights international pricing comparisons for Part B drugs. It is important to note that this brief does not specifically mention Yervoy or ipilimumab.

Based on the information from the provided sources, we cannot definitively conclude whether Yervoy discounts are available for all Medicare plans. It is recommended to consult with Medicare or the specific Medicare plan provider to determine the coverage and potential discounts for Yervoy or any other medication.

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