LOINCActive

LOINC Code 19929-9: Gas flow Respiratory system airway by Rebreathing

19929-9 is a LOINC code used to identify Gas flow Respiratory system airway by Rebreathing in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Gas flow. It is commonly used with the system or sample type Respiratory system.airway.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Gas flow. It is commonly used with the system or sample type Respiratory system.airway.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Method: Rebreathing

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Gas flow Respiratory system airway by Rebreathing
  • Gas flow
  • Breathing; Dynamic; Flow; Gases; Lung; Lungs; Point in time; PULMONARY; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; RS; Volume rate; vRate

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Gas flow Respiratory system airway by RebreathingGas flow Airway RebreathGas flowPULMVRatPtRespiratory system.airway

Frequently asked questions

Code details

Code19929-9
SystemLOINC
Display nameGas flow Respiratory system airway by Rebreathing
DescriptionGas flow
Short nameGas flow Airway Rebreath
ComponentGas flow
PropertyVRat
TimingPt
System (specimen)Respiratory system.airway
ScaleQn
MethodRebreathing
ClassPULM
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.40

Part names

Gas flowVRatPtRespiratory system.airwayQnRebreathingVolume RatePoint in time (spot)Respiratory system airway

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.