There are a number of options for Visit Numbers that you can use on your forms. In the Auto Fill section on the left-hand side.
Attended Visits:
Actual number of attended visits total for case (NEW Function as of 11/2018) have to be at version: 4.5.78 or higher to use this.
Visit Number:
The number assigned when the visit is charged (has to do with EPS) can be out of order if the visit is charged out of order.
Visits Last 30 Days:
Only visits in the last 30 days (does not count current visit) This was our default (historically) for our stock forms, and what we recommended in the past.
Visits Missed:
All missed visits (no-show & cancels)
Visits Prior:
Same as Visit Number only does not include the current visit.