his query is regarding the National Committee for Quality Assurance stewarded measure CMS136V13. 

The new function section definition, that is added for  

CMD.RolloutIntervals(intervals List<Interval<Date>>) 

• intervals I aggregate all R starting ( null as List<Interval<Date>>): R 
    union (
  Unknown macro: { I X       let S}

   
        return Interval[S, E]} 
    ) 

Here, we want to confirm before proceeding with the development of the measure. 

1. Does Start of X in the above function indicates-Start Date of the first medication & end of Last (R) signifies the Stop Date of the medication, which should be maximum according to the above function, so should we cover the gaps too? 

1. If there’s a gap in between the start date and stop date (without overlaps of the same medication, are we considering it in the period for which the patient was on that medication or are we leaving the gaps and then considering the covered days for the medication?  

Since in your definition section of the HR, The definition for treatment days step 1 says, ‘For same medications that are prescribed on the same day or on different days with overlapping days supply, the days supply is summed. The start and end dates are then identified. The start date is the date of service of the earliest prescription event and the first covered day.’ 

Also on the contrary, there’s a given example in which it says, ‘If there are three 7-days supply prescription events for the same medication on January 1, a 7-days supply prescription event on January 20 and a 7-days supply prescription event on January 28, the start date is January 1 and the end date is February 4. Covered days include January 1–February 4. ‘  

Here in the above example there’s a gap in between the prescription events and that too is not under the overlapping condition, so are we summing this kind of scenarios up and then calculating the covered days like the above example as its for Cumulative Medication Duration Greater Than or Equal to 210 Days? 

1. Step 2: For all other events (multiple prescriptions for the same medication on different days without overlap, multiple prescriptions for different medications on the same or different days, with or without overlap), the covered days are identified by the start and end dates for each prescription event individually. The start date through the end date are considered covered days. This rule assumes the member will take the different medications concurrently. 

Here in the above scenario also, are we summing the gaps between different medications even if the covered days events are calculated individually?