HL7 RGV_O15 Pharmacy/Treatment Give

A scheduled or instructed give, sitting between the order and actual administration.
HL7 message structure RGV_O15 groups and segments from HL7 v2.5.1 Hide structure

These are the generated groups and segments for the version selected at the top of the page. The article explains the workflow, and this panel follows the chosen HL7 version.

Message Structure

SegmentNameRequiredRepeatable
MSH
 Message Header Yes No
SFT
 Software Segment No Yes
NTE
 Notes and Comments No Yes
RGV_O15.PATIENT
 Patient group No No
PID
 Patient Identification Yes No
NTE
 Notes and Comments No Yes
AL1
 Patient Allergy Information No Yes
RGV_O15.PATIENT_VISIT
 Patient Visit group No No
PV1
 Patient Visit Yes No
PV2
 Patient Visit - Additional Information No No
RGV_O15.ORDER
 Order group Yes Yes
ORC
 Common Order Yes No
RGV_O15.TIMING
 Timing group No Yes
TQ1
 Timing/Quantity Yes No
TQ2
 Timing/Quantity Relationship No Yes
RGV_O15.ORDER_DETAIL
 Order Detail group No No
RXO
 Pharmacy/Treatment Order Yes No
RGV_O15.ORDER_DETAIL_SUPPLEMENT
 Order Detail Supplement group No No
NTE
 Notes and Comments Yes Yes
RXR
 Pharmacy/Treatment Route Yes Yes
RGV_O15.COMPONENTS
 Components group No Yes
RXC
 Pharmacy/Treatment Component Order Yes No
NTE
 Notes and Comments No Yes
RGV_O15.ENCODING
 Encoding group No No
RXE
 Pharmacy/Treatment Encoded Order Yes No
RGV_O15.TIMING_ENCODED
 Timing Encoded group Yes Yes
TQ1
 Timing/Quantity Yes No
TQ2
 Timing/Quantity Relationship No Yes
RXR
 Pharmacy/Treatment Route Yes Yes
RXC
 Pharmacy/Treatment Component Order No Yes
RGV_O15.GIVE
 Give group Yes Yes
RXG
 Pharmacy/Treatment Give Yes No
RGV_O15.TIMING_GIVE
 Timing Give group Yes Yes
TQ1
 Timing/Quantity Yes No
TQ2
 Timing/Quantity Relationship No Yes
RXR
 Pharmacy/Treatment Route Yes Yes
RXC
 Pharmacy/Treatment Component Order No Yes
RGV_O15.OBSERVATION
 Observation group Yes Yes
OBX
 Observation/Result No No
NTE
 Notes and Comments No Yes

RGV_O15 is the pharmacy/treatment give message. It carries give-level instructions using RXG, often with timing, route, and component information. In practice it can represent a scheduled medication or treatment event that a nursing or administration system should act on.

This message is less commonly seen than RDE, RDS, and RAS, but it appears in medication workflows where the system distinguishes the encoded order, the dispense, the scheduled give, and the recorded administration.

A small RGV example

MSH|^~\&|PHARM|CITYHOSP|MAR|CITYHOSP|20260715130000||RGV^O15^RGV_O15|RGV00001|P|2.5.1 PID|1||123456^^^CITYHOSP^MR||Smith^Jane^Anne^^Ms^^L||19800314|F PV1|1|I|WARD2^205^1^CITYHOSP ORC|RE|MED448811^EHR|RX998877^PHARM RXE|^^^20260715120000|AMOX500^Amoxicillin 500 mg capsule^L|1|CAP^capsule^UCUM RXG|1|AMOX500^Amoxicillin 500 mg capsule^L|20260715140000|1|CAP^capsule^UCUM|||||12345^Nurse^Nora TQ1|1|||Q8H^Every 8 hours^HL70335||20260715140000 RXR|PO^Oral^HL70162

What systems do with it

The sender is usually pharmacy or a medication scheduling component. The receiver is often a MAR, nursing system, or treatment administration application. The receiver uses the give group to display or prepare a specific scheduled medication event.

That makes RGV different from RAS. RGV can describe what should be given; RAS records what was actually administered. Sites vary, so check the local profile before assuming one message replaces the other.

How to read the structure

The order group starts with ORC, can repeat requested and encoded order detail, then requires one or more give groups. Each give group contains RXG, timing, RXR, optional RXC, and observation details.

When the give group includes components, keep them tied to the give instance. A component mixture or infusion detail disconnected from its timing can be clinically misleading.

Implementation traps

The trap is treating RGV as a generic medication order. If the receiver files it as a new order instead of a scheduled give, duplicate orders and confusing MAR rows can appear. Make sure ORC identifiers and RXG timing are used to match the intended schedule.

Reference notes

HL7 pharmacy/treatment material describes RGV as the give message, with RXG carrying drug or treatment administration instructions. The generated local structure above shows where RXG sits relative to ORC, RXE, timing, route, components, and observations.