Source: https://www.tatrabanka.sk/en/personal/cards/my-doctor/#MRI
I don't know if it fits here, but getting an earlier appointment because of what bank/CC you use feels... odd.
Sorry, I didn't think of it that way.
I have tried searching for how it works from someone who used it, but I found no such mention on the internet.
I also didn't find specific ToS to this service, unlike for example with insurance "they" provide, which is just a ToS of third party insurance companies.