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 23720-6: Feline herpesvirus 1 Ag IF Ql (Tiss)

Name: LOINC Code 23720-6: Feline herpesvirus 1 Ag IF Ql (Tiss)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:12.417Z

23720-6 is a LOINC code used to identify Feline herpesvirus 1 Ag IF Ql (Tiss) 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 Feline herpesvirus 1 Ag. It is commonly used with the system or sample type Tiss.

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 Feline herpesvirus 1 Ag. It is commonly used with the system or sample type Tiss.

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

Feline herpesvirus 1 Ag [Presence] in Tissue by Immunofluorescence
Feline herpesvirus 1 Ag
ACIF; Anticomplement Immunofluorescence; Antigen; Antigens; DFA; FA; FeHV; FeHV1; FeHV-1; Felid herpesvirus 1; Feline viral rhinotracheitis; Fluorescent antibody; Fluoresent; Herpes virus; i; ID; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Time Resolved Fluorescence; Tissue; Tissue, unspecified; 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

Feline herpesvirus 1 Ag IF Ql (Tiss)Feline herpesvirus 1 Ag [Presence] in Tissue by ImmunofluorescenceFeHV1 Ag Tiss Ql IFFeline herpesvirus 1 AgMICROFeline Herpesvirus 1 antigen, TissuePrThr

Frequently asked questions

Code details

Code23720-6

SystemLOINC

Display nameFeline herpesvirus 1 Ag IF Ql (Tiss)

DescriptionFeline herpesvirus 1 Ag

Short nameFeHV1 Ag Tiss Ql IF

ComponentFeline herpesvirus 1 Ag

PropertyPrThr

TimingPt

System (specimen)Tiss

ScaleOrd

MethodIF

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0n

Last changed2.56

Consumer names

Feline Herpesvirus 1 antigen, Tissue

Part names

Feline herpesvirus 1 AgPrThrPtTissOrdIFPresence or ThresholdPoint in time (spot)Tissue and SmearsImmunofluorescence (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.