If you go into a Diversion /recovery program the typical scenario is that you are off work for the first 6 mos to a year. During that time you will be requured to be in some kind of treatment, attend daily AA/NA meetings and subject yourself to random Urine test on demand. Most of these programs will not allow you to have any mind altering drugs others than antidepressants. no benzo's no sleeping pills, no alcohol no exceptions.
After the first 6 mos or so the program will decide that you are ready to go back to work. It will most likely be a non-patient care position you'll do that 6mos to a year then move to patient care, then get narcotic access back, etc....
The whole process takes about 3 to 5 years to complete - it can be very stressful at times but it is possible to get through it. It will go easier for you start treatment right away that way when you do get in front of the board they will see someone in active recovery. If you can't afford treatment at least start going to meetings as all diversion pograms require 90 meetings in 90 days so you can at leat get that under your belt.
Peace and Namaste
Hppy