2022 Part D plans should cover Shingrix but the amount of out of pocket is gonna vary by the plan and whether or not the deductible has been satisfied for 2022.
BTW, it is (2) shot dose, taken a few weeks apart - I forgot how long. The price could cover both shots - depends on the plan.
You (and wife) are gonna probably kick yourself when I tell you that beginning January 2023, the Inflation Reduction Act legislated that for those vaccines that are recommended by the ACIP/CDC, there are NO copays applicable -
Medicare.gov - Saving money with the Inflation Reduction Act
From the link ~
Better access to vaccines
Starting in 2023, people with Medicare Part D drug coverage will pay nothing out-of-pocket for even more vaccines, including the shingles vaccine, that are recommended by the Advisory Committee on Immunization Practices.
Sorry, I don't think she can give it back - 😜
It's Always Something . . . . Roseanna Roseannadanna