Unfortunately, it's not that simple.. Everything is audited, and if you DON'T ask, you will get written up for it. Medicine has changed in the 17 years I've been in it. It's all bureaucratic BS, with new government regulations saying "if you don't do this, you don't get paid".. Money has become the big motivator , which sucks for the patients, because they are the ones that ultimately lose out. Do you know that doctors offices get money back from the government just for doing prescriptions electronically, and if they don't do so much percentage, Medicare will penalize them? It's a joke.
But as far as I know this is not a required question... cannot find anything in CMS requirement anyway.
here is an article Lawyers, Guns and Doctors | The Health Care Blog that I suggest everyone read. Might give you some things to bring up if your doctor asks you about gun ownership. (and I don't agree with that authors idea on background checks so don't get off on a tangent)
This is basically the government and anti-gun medical organizations like the AMA trying to make subtle or not so subtle labeling of guns as unsafe. Slow moving of the psyche of a population by incrementalism.
Many of the doctors and staff don't even realize they are being used. So you could use this as a way to educate them.
For example:
Say something like "how is this relevant to my visit and your treatment plan today?" They will probably say it isn't about today's visit, but is about public safety and trying to prevent accidental injuries etc.. Which you can then ask if they are going to ask about all other potential dangers (pools, pets, power tools, stairs, exposed wiring, automobiles, sports, etc). If they say no, ask them: "Why not? especially since injuries and deaths are much more likely in the family pool then they are from a gun or power tools"
Might help a few of them realize they are being used.
You can then say.. "I really don't need to be educated about safety issues in the home or elsewhere. Please note these question are "Not Applicable" to me and please make a note to skip them in the future, and let's instead focus on the reason I am here today."
No matter what, I would have a prepared response to questions that aren't relevant to your visit. With medical records going electronic it will be easy for the government to find out what is in those records if they really want to, illegal or not. Once that info is online there is no taking it back.