Wow. For me, it is, here is the lab slip. I think it is really important that you do it because of this and this. After that, I forget about it. This may sound terrible, but I wouldn't waste a stamp to send them a letter nor would I even walk across the street to ask them why they didn't go. This is COMPLETELY their responsibility. I don't think it is our issue at all.
Now, in pediatrics, it is slightly different. I either let it go or I think the child's health will be severely jeopardized if the test isn't done and I call CPS. That is rare, though. But, ultimately, it is the parent's job.
I guess I am not sure what the reason for reconciling all of these labs are. I would have to hire two more staff to check off when labs came back. What did we do before CCHIT and HIT and health maintenance, etc. My doctor gives me a requisition, and he expects me to take it to the lab. The only letter I will get is the bill from him and the lab.
I respect your view and find it highly commendable.