Since this Discussion started with Evenity I thought I'd answer the questions that have come up regarding Medicare. I have Traditional Medicare and do not have a Medicare Advantage Plan.
Evenity must be administered at an infusion center or hospital/clinic. For that reason, Evenity can be billed as Medicare Part B (outpatient such as going to your doctor's office) and not as Part D that you get from the pharmacy and that you administer to yourself. I don't know how it works with other medications such as Prolia or Tymlos.

It can be really difficult to figure what is covered, what your co-pay will be, and what is not covered. It's best to call or write your insurance company. I do know that if Medicare has approved coverage of a medication that all Medicare Advantage programs and Part D prescription plans must include the medication in their coverage. However, the costs will differ between plans. That's where it can get confusing.

Just an FYI. I was introduced to GoodRX by a pharmacist. I always check GoodRX when I get a new prescription because sometimes their co-pay is less than my Part D prescription plan. It's so crazy.