OM2 - Numeric Observation (HL7 v2.4)
Versions: v2.3 v2.3.1 v2.4 v2.5.1 v2.6 v2.7.1
The OM2 segment (Numeric Observation) has 10 fields in HL7 v2.4. Fields are addressed as
OM2-n; composite fields break into components OM2-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 | Units of Measure | CE | 250 | Optional | No | |
| 3 | Range of Decimal Precision | NM | 10 | Optional | Yes | |
| 4 | Corresponding SI Units of Measure | CE | 250 | Optional | No | |
| 5 | SI Conversion Factor | TX | 60 | Optional | No | |
| 6 | Reference | RFR | 250 | Optional | No | |
| 7 | Critical Range for Ordinal and Continuous Observations | NR | 205 | Optional | No | |
| 8 | Absolute Range for Ordinal and Continuous Observations | RFR | 250 | Optional | No | |
| 9 | Delta Check Criteria | DLT | 250 | Optional | Yes | |
| 10 | Minimum Meaningful Increments | NM | 20 | Optional | No |