I really don't know. Do you have a supplement plan now? If not, I would do some research and call issuers of the supplement plans and ask them specifically. Or if it's on their websites, copy the information as it's a representation of what they offer. If you do get a supplement plan and coverage is denied, you would have evidence inferring false representation, although that's no comfort if it doesn't cover chemo payments.
I think a better and more reliable source would be your oncologist. She/he should have a billing specialist on staff (or contracted out) and would know which plans cover chemo payments.
Another option is to contact a local Gilda's Club; they might have some information on that.
But I think your oncologist's office is the best bet, as they'll have seen what's covered by which plans.
This is going to be insurance carrier by carrier. If the policy isn't specific enough...call them
I think a better and more reliable source would be your oncologist. She/he should have a billing specialist on staff (or contracted out) and would know which plans cover chemo payments.
Another option is to contact a local Gilda's Club; they might have some information on that.
But I think your oncologist's office is the best bet, as they'll have seen what's covered by which plans.
Good luck.