Actually per the link you provided: In the Medicare manual it states:
Item 24G - Enter the number of days or units. This field is most commonly used for multiple visits, units of supplies, anesthesia minutes, or oxygen volume. If only one service is performed, the numeral 1 must be entered.
Some services require that the actual number or quantity billed be clearly indicated on the claim form (e.g., multiple ostomy or urinary supplies, medication dosages, or allergy testing procedures). When multiple services are provided, enter the actual number provided.
For anesthesia, show the elapsed time (minutes) in item 24g. Convert hours into minutes and enter the total minutes required for this procedure.
Each individual procedure is actually a different service not a multiple of the same service. Kind of a hard concept but it is true. The MUE are the number of times per day Medicare will allow the same service to be billed. At any rate I know this will not stop the usage of units, but if you compare claims (I Have) you may see that individual listing of services actual increases reimbursement. Maybe not with every carrier but enough to make a difference.