00572
Observation Sub-ID
2015-07-13
Definition: This field is used to distinguish between multiple OBX segments with the same observation ID organized under one OBR. Starting with V2.8.2 the data type was changed from ST to OG to enable improved structured grouping of observation segments. In this enhanced mode, the first component provides backwards compatibility with existing grouping schemes, while the additional components can be used for improved structures as defined in specific conformance profiles. For example, a chest X-ray report might include three separate diagnostic impressions. The standard requires three OBX segments, one for each impression. By putting a 1 in the Sub-ID of the first of these OBX segments, 2 in the second, and 3 in the third, we can uniquely identify each OBX segment for editing or replacement.
The sub-identifier is also used to group related components in reports such as surgical pathology. It is traditional for surgical pathology reports to include all the tissues taken from one surgical procedure in one report. Consider, for example, a single surgical pathology report that describes the examination of gallbladder and appendix tissue. This report would be transmitted roughly as shown in Figure 7-2.
Distinct Observations
88304&ANT
22634-0^Path report.gross observation^LN
22635-7^Path report.microscopic observation^LN
34574-4^Path report.final diagnosis^LN
Sub ID 1st Group
1
1
1
1
Sub ID 2nd Group
2
2
2
2
TBD: HEADER
TBD: HEADER
TBD: HEADER
TBD: HEADER
TBD: HEADER
Length20 (No truncation)
4 components
| 1 | O | - | Original Sub-Identifier | |
| 2 | O | - | Group | |
| 3 | O | - | Sequence | |
| 4 | O | - | Identifier |