They are not allowed to discuss anything about any patients to random people or even the patient's family because of Patient Confidentiality laws. So therefore, the clinic wouldn't discuss anything like that to anyone, except the patient..
my opinion, my decision to let someone know would be based on my motivations for doing so; is this someone close to me that I genuinely care about and want to see do better? Does their behavior have a negative impact on their children (if any)? The clinic is good about weeding out the abusers, it just takes time. They could even already be aware of the situation, and are helping this person through it. If their monthly "random" (just about the same week every month) urine screens are genuinely clear, using their own urine (not synthetic or a friend's urine), and the clinic should be made aware of what's going on, you should give them a call to explain the issue. The clinic will schedule an observed urine screen at a time that will be unexpected, or possibly a blood draw. Since this happens on occasion, it won't raise any flags with the person in question and get them the extra help they need.
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