Calculating Median on Measure

Thank you all very much I ended up doing the following

Created my 5 measure of last 5 months (As i needed 5 months count to calculate median)

One = calculate (COUNT(ClaimsConvertedData[CustID]), DATESINPERIOD ( ClaimsConvertedData[PROCDATE], EOMONTH ( MAX ( ClaimsConvertedData[PROCDATE] ), -1 ), -1, MONTH ),FILTER(ClaimsConvertedData,ClaimsConvertedData[T&C Identifier]="Y"))

Two = calculate (COUNT(ClaimsConvertedData[CustID]), DATESINPERIOD ( ClaimsConvertedData[PROCDATE], EOMONTH ( MAX ( ClaimsConvertedData[PROCDATE] ), -2 ), -1, MONTH ),FILTER(ClaimsConvertedData,ClaimsConvertedData[T&C Identifier]="Y"))

and so on.

The following is the measure that returns the median.

median = MEDIANX(
Union(
    ROW("Measure", "Measure 1", "Measure Value",[One]),
    ROW("Measure", "Measure 2", "Measure Value",[Two]),
    ROW("Measure", "Measure 3", "Measure Value",[Three]),
    ROW("Measure", "Measure 4", "Measure Value",[Four]),
    ROW("Measure", "Measure 5", "Measure Value",[Five])
),[Measure Value])