[[What possible cause of action could you ever have for Malpractice in this scenario?]]
Seriousl;y? If a doctor lies about your non answer, and you lose your 2n’d amendment right as a result- of course you have a case against said doctor- especially if you a record of your answers and the doctor states something you never said- that is malpractice-
A doctor doesn’t have to lie about you. They just put down “refused to answer. Probable owner”. Boom you have no “malpractice” or “defamation” case. Although the government will note this as indicating you are a gun owner.