LOINC

LOINC Code 65823-7: Gas flow FEV 75%

65823-7 is a LOINC code used to identify Gas flow FEV 75% 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 at 75% of forced expiration. 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 at 75% of forced expiration. 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: TRIAL

What it does not mean

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

Key facts

  • Gas flow FEV 75%
  • Gas flow at 75% of forced expiration
  • Breathing; Dynamic; Exp; FEF 75%; 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 FEV 75%Gas flow at 75% of forced expirationPULMVRatPtRespiratory system.airwayQn

Frequently asked questions

Code details

Code65823-7
SystemLOINC
Display nameGas flow FEV 75%
DescriptionGas flow at 75% of forced expiration
Short nameGas flow FEV 75%
ComponentGas flow at 75% of forced expiration
PropertyVRat
TimingPt
System (specimen)Respiratory system.airway
ScaleQn
ClassPULM
StatusTRIAL

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.36
Last changed2.65

Part names

Gas flow at 75% of forced expirationVRatPtRespiratory system.airwayQnFEF 75%Volume 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.

LOINC Code 65823-7 | HealthAssure