If it isn't covered, check with the dispensing pharmacy and med manufacturer/patient care folks before making a decision about the job change. I'm am currently on and have previously been on several different highly expensive specialty medications and there are usually assistant programs/coupons through the manufacturer that will cover it if insurance denies, but make sure there is no limit and that it will cover enough of the cost (of the meds people with my condition take, the manufacturer of one specific med recently got greedy and put a yearly limit on their coupon...after spending $$$$ marketing it as the superior med in that group despite it being the least effective for most people, horrible pharma company).

There's also NORD (National Organization for Rare Diseases) if yours is a rare disease and they happen to have funding available.