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 20742-3: Canine distemper virus Ag IF Ql (Conj)

Name: LOINC Code 20742-3: Canine distemper virus Ag IF Ql (Conj)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:28.850Z

20742-3 is a LOINC code used to identify Canine distemper virus Ag IF Ql (Conj) 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 Canine distemper virus Ag. It is commonly used with the system or sample type Cnjt.

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 Canine distemper virus Ag. It is commonly used with the system or sample type Cnjt.

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: IF

What it does not mean

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

Key facts

Canine distemper virus Ag [Presence] in Conjunctival specimen by Immunofluorescence
Canine distemper virus Ag
ACIF; Anticomplement Immunofluorescence; Antigen; Antigens; Canine distemper; CDV; Conjunct; Conjunctiva; Conjunctival; DFA; Dog; FA; Fluorescent antibody; Fluoresent; ID; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Infectious Disease; InfectiousDisease; Microbiology; Morbillivirus; Ordinal; Palpebral sac; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Time Resolved Fluorescence; TRF; Vet; Veterinary

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

Canine distemper virus Ag IF Ql (Conj)Canine distemper virus Ag [Presence] in Conjunctival specimen by ImmunofluorescenceCDV Ag Conjunct Ql IFCanine distemper virus AgMICROCanine Distemper virus antigen, ConjunctivaPrThr

Frequently asked questions

Code details

Code20742-3

SystemLOINC

Display nameCanine distemper virus Ag IF Ql (Conj)

DescriptionCanine distemper virus Ag

Short nameCDV Ag Conjunct Ql IF

ComponentCanine distemper virus Ag

PropertyPrThr

TimingPt

System (specimen)Cnjt

ScaleOrd

MethodIF

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0m

Last changed2.67

Consumer names

Canine Distemper virus antigen, Conjunctiva

Part names

Canine distemper virus AgPrThrPtCnjtOrdIFPresence or ThresholdPoint in time (spot)Conjunctival specimenImmunofluorescence (IF)

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.