OM1 - General - fields that apply to most observations (HL7 v2.3)
Versions: v2.3 v2.3.1 v2.4 v2.5.1 v2.6 v2.7.1
The OM1 segment (General - fields that apply to most observations) has 47 fields in HL7 v2.3. Fields are addressed as
OM1-n; composite fields break into components OM1-n.m. Paste a message into the
parser to see every field annotated with this table.
| # | Name | Type | Len | Opt | Repeats | Table |
|---|---|---|---|---|---|---|
| 1 | Sequence Number - Test/ Observation Master File | NM | 4 | Optional | No | |
| 2 | Producer's Test/Observation ID | CE | 200 | Required | No | |
| 3 | Permitted Data Types | ID | 12 | Optional | Yes | 0125 |
| 4 | Specimen Required | ID | 1 | Required | No | 0136 |
| 5 | Producer ID | CE | 200 | Required | No | |
| 6 | Observation Description | CE | 200 | Optional | No | |
| 7 | Other Test/Observation IDs for the Observation | CE | 200 | Optional | No | |
| 8 | Other Names | ST | 200 | Required | Yes | |
| 9 | Preferred Report Name for the Observation | ST | 30 | Optional | No | |
| 10 | Preferred Short Name or Mnemonic for Observation | ST | 8 | Optional | No | |
| 11 | Preferred Long Name for the Observation | ST | 200 | Optional | No | |
| 12 | Orderability | ID | 1 | Optional | No | 0136 |
| 13 | Identity of Instrument Used to Perfrom this Study | CE | 60 | Optional | Yes | |
| 14 | Coded Representation of Method | CE | 200 | Optional | No | |
| 15 | Portable | ID | 1 | Optional | No | 0136 |
| 16 | Observation Producing Department/Section | CE | 60 | Optional | Yes | |
| 17 | Telephone Number of Section | TN | 40 | Optional | No | |
| 18 | Nature of Test/Observation | ID | 1 | Optional | No | 0174 |
| 19 | Report Subheader | CE | 200 | Optional | No | |
| 20 | Report Display Order | ST | 20 | Optional | No | |
| 21 | Date/Time Stamp for any change in Def Attri for Obs | TS | 26 | Optional | No | |
| 22 | Effective Date/Time of Change in Test Proc. that make Results Non-Comparable | TS | 26 | Optional | No | |
| 23 | Typical Turn-Around Time | NM | 20 | Optional | No | |
| 24 | Processing Time | NM | 20 | Optional | No | |
| 25 | Processing Priority | ID | 40 | Optional | Yes | 0168 |
| 26 | Reporting Priority | ID | 5 | Optional | No | 0169 |
| 27 | Outside Site | CE | 200 | Optional | Yes | |
| 28 | Address of Outside Site | AD | 1000 | Optional | No | |
| 29 | Phone Number of Outside Site | TN | 400 | Optional | No | |
| 30 | Confidentiality Code | ID | 1 | Optional | No | 0177 |
| 31 | Observations Required to Interpret the Observation | CE | 200 | Optional | No | |
| 32 | Interpretation of Observations | TX | 65536 | Optional | No | |
| 33 | Contraindications to Observations | CE | 65536 | Optional | No | |
| 34 | Reflex Tests/Observations | CE | 200 | Optional | Yes | |
| 35 | Rules that Trigger Reflex Testing | ST | 80 | Optional | No | |
| 36 | Fixed Canned Message | CE | 65536 | Optional | No | |
| 37 | Patient Preparation | TX | 200 | Optional | No | |
| 38 | Procedure Medication | CE | 200 | Optional | No | |
| 39 | Factors that may Effect the Observation | TX | 200 | Optional | No | |
| 40 | Test/Observation Performance Schedule | ST | 60 | Optional | Yes | |
| 41 | Description of Test Methods | TX | 65536 | Optional | No | |
| 42 | Kind of Quantity Observed | CE | 60 | Optional | No | |
| 43 | Point versus Interval | CE | 60 | Optional | No | |
| 44 | Challenge information | TX | 200 | Optional | No | |
| 45 | Relationship modifier | CE | 200 | Optional | No | |
| 46 | Target anatomic site of test | CE | 200 | Optional | No | |
| 47 | Modality of imaging measurement | CE | 200 | Optional | No |