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 9491-2: Aspergillus sp IgA Qn (S)

Name: LOINC Code 9491-2: Aspergillus sp IgA Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

9491-2 is a LOINC code used to identify Aspergillus sp IgA 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 Aspergillus sp Ab.IgA. It is commonly used with the system or sample type Ser.

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 Aspergillus sp Ab.IgA. 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: ACTIVE
Order vs observation: Both

What it does not mean

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

Key facts

Aspergillus sp IgA Ab [Units/volume] in Serum
Aspergillus sp Ab.IgA
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Asperg; Aspergil; Aspergilis; Aspergilla; Aspergillin; Aspergillosis; Aspergils; Aspergilus; Autoantibodies; Autoantibody; Farmers lung; ID; Immune globulin A; Immunoglobulin A; Infectious Disease; InfectiousDisease; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; species; spp; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Aspergillus sp IgA Qn (S) (9491-2)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Aspergillus sp IgA Qn (S)Aspergillus sp IgA Ab [Units/volume] in SerumAspergillus IgA Ser-aCncAspergillus sp Ab.IgAMICROAspergillus sp IgA antibody, BloodACnc

Frequently asked questions

Code details

Code9491-2

SystemLOINC

Display nameAspergillus sp IgA Qn (S)

DescriptionAspergillus sp Ab.IgA

Short nameAspergillus IgA Ser-aCnc

ComponentAspergillus sp Ab.IgA

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0i

Last changed2.73

Consumer names

Aspergillus sp IgA antibody, Blood

Part names

Aspergillus sp Ab.IgAACncPtSerQnAspergillus sp IgAArbitrary 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.