When billing for ancillary billing of infusion service, are you required by commercial payers to wait until the "to" date passes to bill your claim? Example: You have a patient that gets 500mg of vanco q 12 and on 8/29/14 you dispense 7 day supply, would you have to wait until 9/8 to release the claim or could you go ahead and release it once it is dispensed and the patient receives it. Also would you span date the bill 9/1/14 to 9/7/14?