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HL7 August 13, 2026 3 min read

ADT^A03 — Discharge / End Visit

ADT^A03 signals that a patient's inpatient visit has ended. It closes encounters in downstream systems and triggers billing finalization, bed management, and post-discharge care workflows.

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HL7 3 min

ADT^A08 — Patient Information Update

ADT^A08 broadcasts demographic changes — address, phone, insurance, next-of-kin — to all subscribed systems, keeping the patient master index in sync across the enterprise.

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HL7 3 min

ORU^R01 — Lab Result Message

ORU^R01 carries unsolicited observation results from laboratory and diagnostic systems to the ordering provider's EHR and every subscribed clinical system.

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HL7 3 min

ORM^O01 — Lab Order

ORM^O01 places a new order — lab, radiology, or procedure — from the ordering system to the performing department. It carries clinical context, priority, and collection instructions.

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