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 63331-3: Baker's yeast IgA IF Ql (S)

Name: LOINC Code 63331-3: Baker's yeast IgA IF Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

63331-3 is a LOINC code used to identify Baker's yeast IgA IF Ql (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 Saccharomyces cerevisiae 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 Saccharomyces cerevisiae 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
Method: IF

What it does not mean

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

Key facts

Baker's yeast IgA Ab [Presence] in Serum by Immunofluorescence
Saccharomyces cerevisiae Ab.IgA
ABS; Aby; ACIF; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; ASCA; Autoantibodies; Autoantibody; Bakers yeast; Baker's yeast; f045; f403; f45; FA; Fluorescent antibody; Fluoresent; IFA; Immune fluorescence; Immune globulin A; Immunoflour; Immunofluor; Immunofluorescence; Immunoglobulin A; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; SCA; Screen; Serum; SR; Time Resolved Fluorescence; TRF; Yeast

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 Baker's yeast IgA IF Ql (S) (63331-3)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Baker's yeast IgA IF Ql (S)Baker's yeast IgA Ab [Presence] in Serum by ImmunofluorescenceBaker's yeast IgA Ql IFSaccharomyces cerevisiae Ab.IgAALLERGYBaker's yeast IgA antibodyPrThr

Frequently asked questions

Code details

Code63331-3

SystemLOINC

Display nameBaker's yeast IgA IF Ql (S)

DescriptionSaccharomyces cerevisiae Ab.IgA

Short nameBaker's yeast IgA Ql IF

ComponentSaccharomyces cerevisiae Ab.IgA

PropertyPrThr

TimingPt

System (specimen)Ser

ScaleOrd

MethodIF

ClassALLERGY

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.56

Consumer names

Baker's yeast IgA antibody

Part names

Saccharomyces cerevisiae Ab.IgAPrThrPtSerOrdIFBaker's yeast (Saccharomyces cerevisiae) IgAPresence or ThresholdPoint in time (spot)SerumImmunofluorescence (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.