Have you talked to her finance team? Is she part of the major hospital networks you already visit? If that $600 isn’t your copay but instead the whole cost out

Have you talked to her finance team? Is she part of the major hospital networks you already visit? If that $600 isn’t your copay but instead the whole cost out-of-network, there is almost certainly a way to get that put on a 12 month payment plan or something similar.