You are assalaried, it means you work to someone and you are paid to work a moreless fixed number of hours/day but this someone is probably paid in a
per patient basis. That means your company is in trouble, they will need to hire a lot of people and try to re negotiate contracts to keep the business afloat.
That being said it's better you first try to talk with people in the industry to see how that is affecting jobs and companies survivability. You knows get the whole picture.
Now to address your immediate question you must answer this:
1) Are You working more hours/day?
2) Is somewhat you work getting harder in the sense its getting more of your "juice"?
3) Your responsabilities increased? Example: If you do something wrong that means DEA officers will storm your place? Will your company get issued?
4) There some sort of bonus paid per patient/day? Example you get a few bucks more if you process 200+ patients/week.
Increases in: Workload, Work hours, Responsabilities and Stress are all valid points to ask for a raise.
Also note this situation can be temporary or maybe someone will make a software automatizes a good portion of that paperwork and increases back your
productivity. In that case can you lower back your salary?