If you are staying within the same corporate hospital system, your MDs may very well be able to see your records electronically. They are now supposed to update your meds and problem list every visit. And this stuff is probably the first thing looked at during a visit. Some are taking the time to report all telephone calls and noting the pills are.nt lasting the length of time they should.
Secondly your insurance is possibly sending alerts about all the opiates prescribed and filled by other MDs at some trigger point to all of your MDs. This warning letter gets scanned into the EMR too.
This is just what I have observed at my work.