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 20674-8: Avian adenovirus 2 Ag Immune diff Ql (Tiss)

Name: LOINC Code 20674-8: Avian adenovirus 2 Ag Immune diff Ql (Tiss)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:28.850Z

20674-8 is a LOINC code used to identify Avian adenovirus 2 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 Avian adenovirus 2 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 Avian adenovirus 2 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

Avian adenovirus 2 Ag [Presence] in Tissue by Immune diffusion (ID)
Avian adenovirus 2 Ag
Adeno virus; Antigen; Antigens; Bird; Celo; FAdV; FAdV2; Fowl; HAdV; ID; II; Imm; Immunodiff; Immunodiffusion; Imun; Imune; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; 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.

Common synonyms

Avian adenovirus 2 Ag Immune diff Ql (Tiss)Avian adenovirus 2 Ag [Presence] in Tissue by Immune diffusion (ID)FAdV2 Ag Tiss Ql IDAvian adenovirus 2 AgMICROAvian Adenovirus 2 antigen, TissuePrThr

Frequently asked questions

Code details

Code20674-8

SystemLOINC

Display nameAvian adenovirus 2 Ag Immune diff Ql (Tiss)

DescriptionAvian adenovirus 2 Ag

Short nameFAdV2 Ag Tiss Ql ID

ComponentAvian adenovirus 2 Ag

PropertyPrThr

TimingPt

System (specimen)Tiss

ScaleOrd

MethodImmune diffusion

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0m

Last changed2.56

Consumer names

Avian Adenovirus 2 antigen, Tissue

Part names

Avian adenovirus 2 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.