cds3IntervalNumber 1.3.6.1.4.1.9.9.132.1.3.4.1.1

A number between 0 and 96, where 1 is the most recently completed 15 minute interval and 96 is the 15 minute interval completed 23 hours and 45 minutes prior to interval number 1. Interval number 0 refers to the current 15 minute data.