HL7 v2.5.1 Specificationsv2.5.1

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Chapter 04: Order Entry

Ordering tests, drugs and diets.

A test ordered, a drug prescribed, a diet requested, and the messages that later change or cancel any of those. The order is separate from the result it eventually produces, which lives in chapter 7.

What is in this chapter

Message types defined here

Segments defined here

These 20 segments are defined in chapter 04. Messages in other chapters may still carry them.

Trigger events

A trigger event is the thing that happens in the hospital and causes a message to be sent. Chapter 04 defines 43 of them.

Other chapters