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 99374-1: Silver Birch IgG (S) [Mass/Vol]

Name: LOINC Code 99374-1: Silver Birch IgG (S) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:33.065Z

99374-1 is a LOINC code used to identify Silver Birch 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 Betula verrucosa 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 Betula verrucosa 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

Silver Birch IgG Ab [Mass/volume] in Serum
Betula verrucosa Ab.IgG
ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Common silver birch; Gt3; IFR; Immune globulin G; Immunoglobulin G; Isoflavone reductase; Level; Mass concentration; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; Silver Birch; SR; t3

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

Silver Birch IgG (S) [Mass/Vol]Silver Birch IgG Ab [Mass/volume] in SerumSilver Birch IgG-mCncBetula verrucosa Ab.IgGALLERGYSilver birch IgG antibodyMCnc

Frequently asked questions

Code details

Code99374-1

SystemLOINC

Display nameSilver Birch IgG (S) [Mass/Vol]

DescriptionBetula verrucosa Ab.IgG

Short nameSilver Birch IgG-mCnc

ComponentBetula verrucosa Ab.IgG

PropertyMCnc

TimingPt

System (specimen)Ser

ScaleQn

ClassALLERGY

Example unitsmg/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Consumer names

Silver birch IgG antibody

Part names

Betula verrucosa Ab.IgGMCncPtSerQnSilver Birch (Betula verrucosa) 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.