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Medicare regulations require that doctors ask patients whether they own guns.
From a Vietnam Vet and retired Police Officer:
2. Did I feel threatened?
3. Did I feel like doing harm to someone?
permits for answering "yes" to any one of three diagnostic questions.
In the latter case, the three questions about feeling stressed, threatened, or wanting to harm others are standard diagnostic queries for Post Traumatic Stress Disorder (PTSD) which are routinely posed to VA patients (particularly those who have served in combat areas such as Iraq or Afghanistan). Patients' answers to such questions are protected by doctor/patient confidentiality laws and, except in very limited circumstances, may not be disclosed to government agencies (or anyone else) without the patient's consent, as noted on the web site of the National Rifle Association's Institute for Legislative Action (NRA-ILA):
Sources: