LOINC

LOINC Code 25306-2: A. alternata IgG Qn (S)

25306-2 is a LOINC code used to identify A. alternata IgG Qn (S) 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 Alternaria alternata Ab.IgG. It is commonly used with the system or sample type Ser.

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 Alternaria alternata Ab.IgG. It is commonly used with the system or sample type Ser.

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: DEPRECATED

What it does not mean

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

Key facts

  • Deprecated Alternaria alternata IgG Ab [Units/volume] in Serum
  • Alternaria alternata Ab.IgG
  • A alternata; A tenuis; ABS; Aby; Alternaria tenuis; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Gm6; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; m006; m6; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR

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

A. alternata IgG Qn (S)Deprecated Alternaria alternata IgG Ab [Units/volume] in SerumDeprecated A alternata IgG Ser-aCncAlternaria alternata Ab.IgGMICROAlternaria alternata IgG antibody, BloodACnc

Frequently asked questions

Code details

Code25306-2
SystemLOINC
Display nameA. alternata IgG Qn (S)
DescriptionAlternaria alternata Ab.IgG
Short nameDeprecated A alternata IgG Ser-aCnc
ComponentAlternaria alternata Ab.IgG
PropertyACnc
TimingPt
System (specimen)Ser
ScaleQn
ClassMICRO
StatusDEPRECATED

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.00
Last changed2.69

Consumer names

Alternaria alternata IgG antibody, Blood

Part names

Alternaria alternata Ab.IgGACncPtSerQnAlternaria alternata IgGArbitrary ConcentrationPoint in time (spot)Serum

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.

LOINC Code 25306-2 | HealthAssure