[dtech]

You're right that "patient"-doctor fraud is unlikely, but receiving unnecessary medication (addictive/fun/valuable drugs) or medical people overcharging or charging for unperformed or unnecessary procedures is a possibility for fraud.

[endless1234]

But the personnel are salaried, not paid per procedure.

[lostlogin]

Most hospitals have on-call work, overtime, outsourced work, consumables that can be billed for etc. Pay cheques vary a huge amount depending on work done, and as a radiographer in a regional hospital my yearly wage was more than half made up by penal rates and overtime.