The patient has the right to refuse treatment.

病人有权拒绝治疗。

《柯林斯英汉双解大词典》

Patients with no mental incapacity can refuse treatment.

没有精神缺陷的病人可以拒绝治疗。

youdao

So it's advisable to apply and expand this refuse treatment format.

这种垃圾处理方式值得应用和推广。

youdao

An older person should never refuse treatment because they're having difficulties with transport or caring for a relative.

BBC: Elderly cancer treatment 'shame'

Often people in his state of mind will refuse treatment because they have lost all insight into their condition.

CNN: How can I help someone I fear is abusing Adderall?

It was shame that made him deny the problem and refuse treatment.

NPR: Stigma Can Prevent Much-Needed Mental Help