Funny you should ask. This just popped up the other day over here in Norway:

https://www.dagensmedisin.no/artikler/2019/01/27/brukte-virk...

In summary, when doctors were testing a new electronic patient journal system, they used real social security numbers (our version of them). And just for kicks they tested in production, so the persons used got all kinds of prescriptions for stuff they didn't need etc.