The following message structure may be used for the communication of laboratory and other order messages and must be used for lab automation messages where it is required that the Specimen/Container information is within the ORC/OBR segment group. While the ORM message with the OBR segment can be used for backwards compatibility for general lab messages, only the OML message should be used to take advantage of the specimen and container extensions required in laboratory automation.
The trigger event for this message is any change to a laboratory order. Such changes include submission of new orders, cancellations, updates, etc. OML messages can originate also with a placer, filler, or an interested third party.
Message Structure
47 segments
R RequiredO Optional Choice
MSH
R1SFT
O*UAC
O1NTE
O*PATIENT
O1PID
R1PD1
O1NTE
O*NK1
O*PATIENT_VISIT
O1PV1
R1PV2
O1INSURANCE
O*IN1
R1IN2
O1IN3
O1GT1
O1AL1
O*ORDER
R*ORC
R1TIMING
O*TQ1
R1TQ2
O*OBSERVATION_REQUEST
O1OBR
R1TCD
O1NTE
O*ROL
O*CTD
O1DG1
O*OBSERVATION
O*OBX
R1TCD
O1NTE
O*SPECIMEN
O*SPM
R1OBX
O*CONTAINER
O*SAC
R1OBX
O*PRIOR_RESULT
O*PATIENT_PRIOR
O1PID
R1PD1
O1PATIENT_VISIT_PRIOR
O1PV1
R1PV2
O1AL1
O*ORDER_PRIOR
R*ORC
O1OBR
R1NTE
O*ROL
O*TIMING_PRIOR
O*TQ1
R1TQ2
O*OBSERVATION_PRIOR
R*OBX
R1NTE
O*FT1
O*CTI
O*BLG
O1Used by Events:O21OML - Laboratory order