Observation_period
Reading from Synthea table encounters.csv

| Destination Field | Source field | Logic | Comment field |
|---|---|---|---|
| observation_period_id | Autogenerate | ||
| person_id | patient | Lookup up PERSON_ID in the PERSON table by mapping patient to PERSON_SOURCE_VALUE | |
| observation_period_start_date | start | Take the earliest START per patient | |
| observation_period_end_date | stop | Take the latest STOP per patient | |
| period_type_concept_id | 44814724 | Set as this concept for all records |