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 23405-4: Rift valley fever virus Ag Immune diff Ql (Tiss)

Name: LOINC Code 23405-4: Rift valley fever virus Ag Immune diff Ql (Tiss)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

23405-4 is a LOINC code used to identify Rift valley fever virus Ag Immune diff 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 Rift valley fever virus Ag. It is commonly used with the system or sample type Tiss.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Rift valley fever virus 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: Immune diffusion

What it does not mean

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

Key facts

Rift valley fever virus Ag [Presence] in Tissue by Immune diffusion (ID)
Rift valley fever virus Ag
Antigen; Antigens; Bunyavirus; ID; Imm; Immunodiff; Immunodiffusion; Imun; Imune; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Rift valley fever; RVFV; Screen; Tissue; Tissue, unspecified

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Rift valley fever virus Ag Immune diff Ql (Tiss) (23405-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Rift valley fever virus Ag Immune diff Ql (Tiss)Rift valley fever virus Ag [Presence] in Tissue by Immune diffusion (ID)RVFV Ag Tiss Ql IDRift valley fever virus AgMICRORift Valley Fever virus antigen, TissuePrThr

Frequently asked questions

Code details

Code23405-4

SystemLOINC

Display nameRift valley fever virus Ag Immune diff Ql (Tiss)

DescriptionRift valley fever virus Ag

Short nameRVFV Ag Tiss Ql ID

ComponentRift valley fever virus Ag

PropertyPrThr

TimingPt

System (specimen)Tiss

ScaleOrd

MethodImmune diffusion

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0n

Last changed2.56

Consumer names

Rift Valley Fever virus antigen, Tissue

Part names

Rift valley fever virus AgPrThrPtTissOrdImmune diffusionPresence or ThresholdPoint in time (spot)Tissue and SmearsImmune diffusion (ID)

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.