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.

LOINCActive

LOINC Code 20135-0: FEV 25%-75% post bronchodilation measured/predicted

Name: LOINC Code 20135-0: FEV 25%-75% post bronchodilation measured/predicted
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:28.845Z

20135-0 is a LOINC code used to identify FEV 25%-75% post bronchodilation measured/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 Volume at 25-75% of forced expiration.post bronchodilation/Volume at 25-75% of forced expiration.predicted. 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 Volume at 25-75% of forced expiration.post bronchodilation/Volume at 25-75% of forced expiration.predicted. 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

What it does not mean

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

Key facts

FEV 25%-75% post bronchodilation measured/predicted
Volume at 25-75% of forced expiration.post bronchodilation/Volume at 25-75% of forced expiration.predicted
After; Breathing; Exp; FEV; FEV 25-75%; FEV 25-75% p BD; Lung; Lungs; Point in time; PST; Pulmonary; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Relative volume; Respiratory; RS; Vol

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

FEV 25%-75% post bronchodilation measured/predictedFEV 25-75% p BD meas/predVolume at 25-75% of forced expiration.post bronchodilation/Volume at 25-75% of forced expiration.predictedPULMRelVolPtRespiratory system

Frequently asked questions

Code details

Code20135-0

SystemLOINC

Display nameFEV 25%-75% post bronchodilation measured/predicted

DescriptionVolume at 25-75% of forced expiration.post bronchodilation/Volume at 25-75% of forced expiration.predicted

Short nameFEV 25-75% p BD meas/pred

ComponentVolume at 25-75% of forced expiration.post bronchodilation/Volume at 25-75% of forced expiration.predicted

PropertyRelVol

TimingPt

System (specimen)Respiratory system

ScaleQn

ClassPULM

Example units%

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0m

Last changed2.66

Part names

Volume at 25-75% of forced expiration.post bronchodilation/Volume at 25-75% of forced expiration.predictedRelVolPtRespiratory systemQnRelative VolumePoint 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.