Health plans don’t like to cover it...including mine.
I have Cigna Medicare part D, and it pays for it. However, because of the high cost the plan must pay, (it’s about $1100 a month)it puts me in a donut hole in just a few months. It still pays for it, but it costs me $150 copay once I’m in the donut hole, instead of the $47 A month I pay for it before I reach the “donut hole”. Still a bargain, but harder to manage.