Flow chart diagnostics. Enter symptoms into the computer, and out pops your diagnosis, complete with a pre-written prescription.
No need for but one Doctor at any one location, as long as the computer is running.
The problem with diagnostics like that is that you failing to report a critical symptom because it isn’t important to you (mention headache, not Mexican trip and pork consumption the prior month or respiratory symptoms but not kids’ classmate with EV-68) can lead to a wrong diagnosis. But once diagnosed, getting it changed is difficult.