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 63166-3: A. terreus IgG (S) [Mass/Vol]

Name: LOINC Code 63166-3: A. terreus IgG (S) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:42.801Z

63166-3 is a LOINC code used to identify A. terreus IgG (S) [Mass/Vol] 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 terreus 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 Aspergillus terreus 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: ACTIVE
Order vs observation: Both

What it does not mean

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

Key facts

Aspergillus terreus IgG Ab [Mass/volume] in Serum
Aspergillus terreus Ab.IgG
A terreus; ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Asperg; Aspergil; Aspergilis; Aspergilla; Aspergillin; Aspergillosis; Aspergils; Aspergilus; Autoantibodies; Autoantibody; Farmers lung; Immune globulin G; Immunoglobulin G; Level; m309; m36; Mass concentration; 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. terreus IgG (S) [Mass/Vol]Aspergillus terreus IgG Ab [Mass/volume] in SerumA terreus IgG-mCncAspergillus terreus Ab.IgGALLERGYAspergillus terreus IgG antibodyMCnc

Frequently asked questions

Code details

Code63166-3

SystemLOINC

Display nameA. terreus IgG (S) [Mass/Vol]

DescriptionAspergillus terreus Ab.IgG

Short nameA terreus IgG-mCnc

ComponentAspergillus terreus Ab.IgG

PropertyMCnc

TimingPt

System (specimen)Ser

ScaleQn

ClassALLERGY

Example unitsug/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.73

Consumer names

Aspergillus terreus IgG antibody

Part names

Aspergillus terreus Ab.IgGMCncPtSerQnAspergillus terreus IgGMass 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.