What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 69971-0: FEF 25-75% Predicted

Name: LOINC Code 69971-0: FEF 25-75% Predicted
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:48.867Z

69971-0 is a LOINC code used to identify FEF 25-75% Predicted 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 25-75% of forced expiration. It is commonly used with the system or sample type Respiratory system.

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 25-75% of forced expiration. It is commonly used with the system or sample type Respiratory system.

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
Order vs observation: Both
Method: Predicted

What it does not mean

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

Key facts

FEF 25-75% Predicted
Gas flow at 25-75% of forced expiration
Breathing; Dynamic; Exp; FEF 25-75%; Flow; Forced expiratory flow rate; 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

FEF 25-75% PredictedGas flow at 25-75% of forced expirationPULMVRatPtRespiratory systemQn

Frequently asked questions

Code details

Code69971-0

SystemLOINC

Display nameFEF 25-75% Predicted

DescriptionGas flow at 25-75% of forced expiration

Short nameFEF 25-75% Predicted

ComponentGas flow at 25-75% of forced expiration

PropertyVRat

TimingPt

System (specimen)Respiratory system

ScaleQn

MethodPredicted

ClassPULM

Example unitsL/s

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.40

Last changed2.73

Part names

Gas flow at 25-75% of forced expirationVRatPtRespiratory systemQnPredictedFEF 25-75%Volume RatePoint in time (spot)

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.