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.

LOINCActiveObservation

LOINC Code 99784-1: Laboratory device Positive predictive value

Name: LOINC Code 99784-1: Laboratory device Positive predictive value
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:34.290Z

99784-1 is a LOINC code used to identify Laboratory device Positive predictive value 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 Positive predictive value. It is commonly used with the system or sample type Laboratory device.

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 Positive predictive value. It is commonly used with the system or sample type Laboratory device.

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: Observation

What it does not mean

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

Key facts

Laboratory device Positive predictive value
Positive predictive value
The likelihood of a positive predicted rejection risk is calculated by the plasma levels of dd-cfDNA and the correlated levels with allograft rejection status.
Lab Device; Point in time; Pos; PPV; QNT; Quan; Quant; Quantitative; Random; Risk

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

Laboratory device Positive predictive valueLab Device PPVPositive predictive valueDEVICESLikelihoodPtLaboratory device

Frequently asked questions

Code details

Code99784-1

SystemLOINC

Display nameLaboratory device Positive predictive value

DescriptionPositive predictive value

Short nameLab Device PPV

ComponentPositive predictive value

PropertyLikelihood

TimingPt

System (specimen)Laboratory device

ScaleQn

ClassDEVICES

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Part names

Positive predictive valueLikelihoodPtLaboratory deviceQnPoint 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.