Being a fellow WMer and familiar with immunotherapy meds and costs, I can tell you that plans vary from state to state. Before signing up for a specific plan, they should be able to tell you if a certain medication is covered and, if so, what your out-of-pocket cost will be. Drugs like Ibrutinib & Zanubrutinib come from Specialty Pharmacies. You also need to check what your yearly deductible will be. It is not an easy process to work through. Good luck.

Trust you already asked your insurance that question.
If on Medicare, try phoning them to ask whether a particular Med is covered.