“Refuse to answer....” “Ditto!” It’s none of their business.
“Amendment IV, US Constitution: The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable causes, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.”
I will ask the Doctor if he has a warrant.
Further, I will tell my RN wife that it is not her place nor responsibility to ask patients any questions about gun ownership, ammo storage, etc. She will defer to the Doctor to ask those questions. Therefore, she will not be held accountable for not having asked those questions when some nut-case goes off with a weapon.
“I don’t discuss my personal security requirements with anyone but my family.”
And then promptly pull out a checklist and begin asking the doctor about his guns. Keep asking the questions until you see the light click on on their faces. Tell them you as a citizen of America need to make thoroughly certain that they, as a doctor, are in no position to “do no harm” to anyone, ever, as a doctor, or a person. Do not back down.