Thank you for your inquiry for CMS128v12, Anti-depressant Medication Management (2024 performance period). Assuming the following information is documented, the returned calculation from function "MedicationDispensedPeriod" would be 2023-09-25 through 2024-01-08. Note that this return would then be used to calculate cumulative medication duration in the measure via the function "CumulativeDuration". Medication Dispensed relevantPeriod.low = 2023-09-25 Medication Dispensed relevantPeriod.high = 2024-01-09 Medication Dispensed supply = 106 Medication Dispensed dosage = 1 Medication Dispensed frequency = 24 h totalDaysSupplied = 106/(1*(24/24)) = 106 See functions referenced below. CMD.MedicationDispensedPeriod(MedDispense "Medication, Dispensed") MedDispense Dispense let startDate: date from Coalesce(Dispense.relevantPeriod.low, Dispense.relevantDatetime, Dispense.authorDatetime), totalDaysSupplied: Coalesce(Dispense.supply.value /(Dispense.dosage.value * ToDaily(Dispense.frequency)), Dispense.daysSupplied) return if startDate is null then null else if totalDaysSupplied is not null then Interval[startDate, startDate + Quantity { value: totalDaysSupplied - 1, unit: 'day' }] else if Dispense.relevantPeriod.high is not null then Interval[startDate, date from end of Dispense.relevantPeriod] else null CMD.CumulativeDuration(Intervals List<Interval<Date>>) if Intervals is not null then ( Sum((collapse Intervals per day)X return all(difference in days between start of X and end of X )+ 1 ) ) else null