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.

LOINC

LOINC Code 65657-9: Deprecated FEV1/predicted

Name: LOINC Code 65657-9: Deprecated FEV1/predicted
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:45.457Z

65657-9 is a LOINC code used to identify Deprecated FEV1/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 expired during 1.0 s of forced expiration/Forced vital capacity.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 expired during 1.0 s of forced expiration/Forced vital capacity.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: DEPRECATED

What it does not mean

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

Key facts

Deprecated FEV1/predicted
Volume expired during 1.0 s of forced expiration/Forced vital capacity.predicted
Breathing; End tidal volume; Exp; FEV; FEV1; FEV1%; FEV1/FVC; Forced expiratory volume in 1 second; FVC; Lung; Lungs; Point in time; predicted FVC; PULMONARY; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; RS; S prime; VC; Vet; Vol; Vol exp; Volume ratio

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

Deprecated FEV1/predictedDeprecated FEV1/predicted FVCVolume expired during 1.0 s of forced expiration/Forced vital capacity.predictedPULMVRtoPtRespiratory system

Frequently asked questions

Code details

Code65657-9

SystemLOINC

Display nameDeprecated FEV1/predicted

DescriptionVolume expired during 1.0 s of forced expiration/Forced vital capacity.predicted

Short nameDeprecated FEV1/predicted FVC

ComponentVolume expired during 1.0 s of forced expiration/Forced vital capacity.predicted

PropertyVRto

TimingPt

System (specimen)Respiratory system

ScaleQn

ClassPULM

StatusDEPRECATED

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.40

Part names

Volume expired during 1.0 s of forced expiration/Forced vital capacity.predictedVRtoPtRespiratory systemQnVolume RatioPoint 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.