back when I worked in Illinois the 90 day refill thing was just starting in retail pharmacy (mid 2000's). Per insurance requirements we had to have the diagnosis written down on the hard copy. I had one physician who often would write outside of his specialty (not wanting to rehash the scope of practice debate) - and I honestly can't remember specifics, but it was like pulling teeth to get him to actually tell me a diagnosis. His RN even went so far as saying they couldn't give it to me because of HIPAA. So I printed out a copy of the HIPAA rules and faxed it to him.