Reach out to the Amgen Foundation for help with the out of pocket costs that Medicare part D doesn’t cover.
There’s an application online that your dr. Needs to fill out for a pre authorization and a script. They determine if you’re eligible by household income.
Reach out to your dr. And they should be able to guide you.
I’m on Medicare and just got approved for 1 yrs worth of medicine.

Amgen told me that if I am on Medicare I can't qualify for help through them

Yes. Enbrel. Typo sorry. The 2,000 per month is through my Medicare supplement.

Any chance you mean Enbrel? If so the manufacturer has a financial assistance program for those with commercial insurance to make it more affordable.
If you are on Medicare, getting the med as an infusion at the doctors office or an infusion clinic would be paid for by your Part B. Here is the link.
https://www.enbrelpro.com/resources-and-support...