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Clinical history elements have an OBR-4 value as specified by 4.4.1.4.1 OBR-4 codes in referral messages.
The procedure (PR1) segment should not be used as it been deemed clinically inexpressive instead procedures should be represented in OBX segments using the procedure nodes of the vMR.
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The main body of the referral indicated by the first OBR segment with an OBR-4 value as specified in section 4.4.1.4.1 OBR-4 codes in referral messages. This OBR/OBX group should include in its rendering the atomic data contained (in atomic OBX segments including HL7 v2 VMR) from within it, plus a display representation of all atomic data content in AL1 segments (allergy), and medication data contained in RXO segment groups.
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