Xolair cost for seniors

[Guest guest]

My wife's employer pays for our medical insurance which pays for my

Xolair shots. She will retire in a couple years and loose the

coverage. My employer doesn't offer medical insurance.

I have some questions about this upcoming situation:

1. If I find a new employer that offers medical insurance, am I likely

to have the new insurance company deny Xolair costs as a treatment for

a pre-existing condition?

2. I'll turn 65 in a few years. Will medicare or medigap or medicare

drug coverage pay the Xolair costs and what will the copays be?