HL7 ADT^A34 (Merge patient information - patient id only)
ADT^A34 is the HL7v2 merge patient information - patient id only message, defined in HL7v2 from v2.2 through v2.6, and withdrawn from the standard after v2.6. Its v2.6 structure carries 8 segments and groups, 4 of them required.
Full message structure (v2.6)
Every segment and group the standard defines for ADT^A34, in order, straight from the machine-readable specification. Indented rows sit inside the repeating group above them. R is required, O optional, C conditional; ∞ means the group or segment may repeat without a defined limit.
| Segment / group | Usage | Repeats |
|---|---|---|
| MSH | R | 1 |
| SFT | O | ∞ |
| UAC | O | 1 |
| EVN | R | 1 |
| PID | R | 1 |
| PD1 | O | 1 |
| ARV | O | ∞ |
| MRG | R | 1 |
Which HL7v2 versions changed ADT^A34?
ADT^A34 was defined from v2.2 and withdrawn from the standard after v2.6. Systems still running it are on an older version, which is precisely why it is documented here.
| Versions | What changed |
|---|---|
| v2.2 | First defined, with 4 segments and groups. |
| v2.3 - v2.5.1 | Added PD1. |
| v2.6 | Added ARV, SFT, UAC. |