I've actually never been prescribed a schedule 8 OTHER than methadone so I'm not familiar with the process (other than in my capacity as a prescription nerd and googling the regulations) But it'd be surprised if doctors were actually submitting anything to Medicare when they write ordinary schedule 4 drugs. Especially if they're written privately.
No for schedual 8. My alprazolam scripts went from 4 to 8 in 2014.For a regular non authority schedule 4? I find that really hard to believe. Not saying you're wrong just that I'd be quite surprised.