Description
Date of the beginning of the enrollment period. If the exact date is unknown, use the first day of the month. For implementation of the CDM, a long span of longitudinal data is desirable. However, an enrollment record is intended to represent the dates for which there is complete capture of all medically-attended events, so the data partner’s knowledge of the validity and usability of the data should inform their choice of enrollment start date, especially for historical data more than a decade old. If ENR_BASIS is encounter- based (“E”), the enrollment start date should not be earlier than the earliest encounter date in the datamart for that patient. If ENR_BASIS is based on insurance coverage (“I”), then the enrollment start date may occur before the earliest encounter date in the datamart for that patient.
Data type
date
Alias
- UMLS CUI [1,1]
- C1516879
- UMLS CUI [1,2]
- C0808070