I am pretty sure you just address it normally until the person is actually a doctor
Yes, it is appropriate to address someone with a PhD as "Doctor."
Anybody who is a doctor.
The proper way to address a Doctor of Osteopathic Medicine (DO) (not Doctor of Osteopathy) is Doctor (Dr.) since they are medical physicians.
if they have a doctorate then that's how to address them
Address on envelope to a doctor: Dr. John Doe is the general form.
i need to address a doctor this second
Yes, it is appropriate to address someone with a doctorate as "doctor" as a sign of respect for their academic achievement.
Please take it as soon as your doctor says/allows.
"Doctor"
See a doctor. Soon.
as soon as you know
See a doctor as soon as you can.