The entity identifier defines a given entity within a specified series of identifiers.
The EI is appropriate for, but not limited to, machine or software generated identifiers. The generated identifier goes in the first component. The remaining components, 2 through 4, are known as the assigning authority; they identify the machine/system responsible for generating the identifier in component 1.
4
| Comp# | Comp TBL | FHIR | ||||||
|---|---|---|---|---|---|---|---|---|
| 1 | 303 | O | - | - | EI.1 | entity identifier | ||
| 2 | 450 | O | EI.2 | namespace ID | ||||
| 3 | 451 | O | - | - | EI.3 | universal ID | ||
| 4 | 343 | O | - | EI.4 | universal ID type |
54
2