CDM Table name: OBSERVATION_PERIOD

Reading from JMDC.Enrollment

Destination Field	Source Field	Logic	Comment Field
observation_period_id
person_id	member_id	Remove ‘M’ prefix
observation_period_start_date	observation_start	Set to first of month (E.g. ‘200802’ becomes 1st of February 2008)
observation_period_end_date	observation_end	Set to last day of month (E.g. ‘200801’ becomes 31st of January 2008)
period_type_concept_id			32813 Claim enrolment record