undoctor

un- +‎ doctor

undoctor (third-person singular simple present undoctors, present participle undoctoring, simple past and past participle undoctored)

1. (transitive) To divest of the character or status of a doctor.
   • Thomas Carlyle

     My brother-in-law is a paragon of the class, but he is so by—in as much as possible—undoctoring himself.

2. (transitive) To restore (something illicitly altered) to its correct form.
   • 2012, William L. DeAndrea, Killed in the Act

     If their accountants are undoctoring the books properly, there's evidence he's ripped off something close to two million bucks on this Arizona thing alone.