Did the Prophet, peace and blessings be upon him, receive medical treatment from disbelieving or polytheistic doctors, and what is the authenticity of the narrations mentioned in this regard?

It has not been reported that the Prophet, peace and blessings be upon him, was treated by a disbelieving physician, and that may be due to his lack of need for doctors. However, there is no prohibition against a Muslim being treated by aieving physician. The Prophet, peace and blessings be upon him, advised Sa'd ibn Abi Waqqas to seek treatment from Al-Harith ibn Kaladah, and Al-Harith had not yet embraced Islam. This indicates the permissibility of seeking assistance from the People of the Book in medicine.