The ACC segment carries accident detail when a visit follows an injury: when and where the accident occurred, its type, and whether it was auto- or job-related. It supports injury reporting and claims, and appears mainly in ADT and order messages.
Purpose
ACC records the accident behind an encounter — date/time, coded type, location, and indicators (auto, job-related, death) used by billing, workers' compensation, and reporting.
Used in
ACC appears in ADT (registration of injury-related visits) and order messages where accident context is relevant. See ADT.
Field-by-field reference
Source: HAPI HL7v2 v2.5.1 javadocs (ACC) for sequence, name, and data type. Length is not published in the javadocs (—); Required and Table # are filled from the HL7 v2.5.1 standard where well-established.
| Seq | Name | Data Type | Length | Req | Repeat | Table # | Description |
|---|---|---|---|---|---|---|---|
| ACC-1 | Accident Date/Time | TS | — | O | — | — | When the accident occurred. |
| ACC-2 | Accident Code | CE | — | O | — | HL70050 | Type of accident. |
| ACC-3 | Accident Location | ST | — | O | — | — | Where it occurred. |
| ACC-4 | Auto Accident State | CE | — | O | — | HL70347 | State for auto accidents. |
| ACC-5 | Accident Job Related Indicator | ID | — | O | — | HL70136 | Job-related (Y/N). |
| ACC-6 | Accident Death Indicator | ID | — | O | — | HL70136 | Resulted in death (Y/N). |
| ACC-7 | Entered By | XCN | — | O | — | — | Who entered the record. |
| ACC-8 | Accident Description | ST | — | O | — | — | Free-text description. |
| ACC-9 | Brought In By | ST | — | O | — | — | Who brought the patient in. |
| ACC-10 | Police Notified Indicator | ID | — | O | — | HL70136 | Police notified (Y/N). |
| ACC-11 | Accident Address | XAD | — | O | — | — | Address of the accident. |
Most-used fields
- ACC-1 Accident Date/Time and ACC-2 Accident Code establish what happened and when.
- ACC-5 Job Related Indicator routes workers' compensation claims; ACC-4 captures the auto-accident state.
Version differences (2.3 to 2.8.2)
- 2.4/2.5: ACC-7 onward (entered-by, description, brought-in-by, police, address) added.
- Coded fields use
CE; later versions retain ACC unchanged.
Common mistakes
- Omitting ACC-5/ACC-4 when the accident is job- or auto-related, breaking claims routing.
- Treating ACC-3 (text location) and ACC-11 (structured address) as the same field.
Examples
Minimal valid ACC:
ACC|20260609143000|MV^Motor Vehicle^HL70050
Fully-populated ACC:
ACC|20260609143000|MV^Motor Vehicle^HL70050|Interstate 90 Mile 42|IL^Illinois^HL70347|N|N|1234^SMITH^JANE^^^^MD|Rear-end collision|EMS|Y|I-90^^METROPOLIS^IL^60601
Annotated breakdown of the fully-populated example (selected fields):
ACC ← segment ID
20260609143000 ← ACC-1 Accident Date/Time
MV^Motor Vehicle^HL70050 ← ACC-2 Accident Code
IL^Illinois^HL70347 ← ACC-4 Auto Accident State
N ← ACC-5 Job Related Indicator
N ← ACC-6 Death Indicator
Y ← ACC-10 Police Notified
In-context inside an ADT^A04 (register, injury visit):
MSH|^~&|REG|MERCYGEN|EHR|MERCYGEN|20260609150000||ADT^A04^ADT_A01|MSG905|P|2.5.1
PID|1||MR12345^^^MERCYGEN^MR||DOE^JOHN^Q||19800101|M
PV1|1|E|ED
ACC|20260609143000|MV^Motor Vehicle^HL70050|Interstate 90||N
In-context inside an ORM^O01 (order following an accident):
MSH|^~&|CPOE|MERCYGEN|RAD|MERCYGEN|20260609151000||ORM^O01^ORM_O01|MSG906|P|2.5.1
PID|1||MR12345^^^MERCYGEN^MR||DOE^JOHN^Q||19800101|M
ACC|20260609143000|MV^Motor Vehicle^HL70050
ORC|NW|PON77^MERCYGEN
OBR|1|PON77^MERCYGEN||XR^X-Ray^L
FHIR mapping
No segment-level ConceptMap is published in the v2-to-FHIR IG for ACC. Accident context maps conceptually to a Condition/Observation with an accident extension, or to Claim.accident; implementations define this locally.
Engine considerations
- The indicator fields (ACC-5/6/10) are
Y/Nper table 0136 — normalize casing. - Carry both ACC-1 and ACC-2 where available; many downstream rules key on accident type.
How Vorro parses and produces ACC
Vorro normalizes the Y/N indicator fields, preserves coded accident type and state, and surfaces accident context for claims routing while mapping to the appropriate FHIR accident extension on output.
Related pages
- PID — the patient involved in the accident.
- DG1 — the injury diagnosis that accompanies an accident.
- ADT messages — where ACC accompanies an injury registration.
