---
sourceDocument: Australia Healthcare and Life Sciences
sourceDocumentLink: https://www.servicenow.com/docs/r/australia/healthcare-life-sciences

 Release :

    - australia

ft:locale :

    - en-US

ft:publication_title :

    - Australia Healthcare and Life Sciences

ft:clusterId :

    - hcls

bundleId :

    - hcls

workflow :

    - Customer and Industry


---

# HL7 message log fields

# HL7 message log fields {#ariaid-title1}

Release version: Australia  
Updated May 11, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
Field reference for the HL7 Message Log table
(`sn_hl7_v2_message_log`).
{#hl7-message-log-fields__entry__3}

| Field | Type | Description |
|-|-|-|
| `number` | String | Auto-generated unique identifier for the message log record. Uses the HL7 prefix. |
| `raw_payload` | MultiLine String | The complete raw inbound HL7 v2.x message as received. Caution: This field may contain protected health information (PHI). Access is restricted by a column-level ACL to the `sn_hl7_v2.admin` role, consistent with HIPAA minimum-necessary requirements. |
| `status` | Choice | Processing status of the message. Values: Pending, Processing, Processed, Failed. |
| `message_type` | String (20) | HL7 message type extracted from MSH-9.1 (for example, `ADT`). |
| `message_event` | String (20) | HL7 trigger event extracted from MSH-9.2 (for example, `A03`). |
| `hl7_version` | String (20) | HL7 version extracted from MSH-12 (for example, `2.5.1`). |
| `sending_application` | String (100) | Sending application extracted from MSH-3. |
| `sending_facility` | String (100) | Sending facility extracted from MSH-4. |
| `message_control_id` | String (100) | Message control ID extracted from MSH-10. Used for correlation between the original message and its ACK response. |
| `message_datetime` | DateTime | Message timestamp extracted from MSH-7 and converted to ServiceNow format. |
| `ack_code` | Choice | The acknowledgment code returned to the integration engine. Values: AA (Application Accept), AE (Application Error), AR (Application Rejection). |
| `ack_response` | MultiLine String | The complete raw HL7 ACK response body returned to the integration engine. |
| `error_message` | String (1000) | Failure detail text populated when processing results in an AE or AR ACK code or a Failed status. |
| `additional_notes` | String (4000) | Non-MSH segment data captured during processing. |
| `parsed_data` | JSON | The structured result of parsing the message against the matched parser configuration. Its shape is determined by the `field_name` dotted paths on the configuration's active field maps. Values are raw HL7 strings; HL7 fields absent from the message are stored as `null`. |
[ ]