שולחן ערוך אבן העזר · סימן ע״ט

English

How is he required to pay for her healing? If she became ill, he must heal her (pay her medical costs), whether healing that has a determinate cost or an indeterminate cost. But his widow is not healed from his estate except for healing which has no determinate cost, which is similar to food [payments].

English

If the heirs wish to specify a cost with the doctor, such that [her healing] will have a determinate cost and they will be relieved of payment, they are permitted to do so.

English

If a woman contracts a lasting disease, he is able to say to her that the ketuba can be assumed if she heals herself or the ketuba can be absolved and give her the ketuba , but this is not proper behavior because it is not derech eretz .