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 99464-0: Sweet Vernal grass IgG (S) [Mass/Vol]

Name: LOINC Code 99464-0: Sweet Vernal grass IgG (S) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:33.065Z

99464-0 is a LOINC code used to identify Sweet Vernal grass 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 Anthoxanthum odoratum 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 Anthoxanthum odoratum 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

Sweet Vernal grass IgG Ab [Mass/volume] in Serum
Anthoxanthum odoratum Ab.IgG
ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; g001; g1; Immune globulin G; Immunoglobulin G; Level; Mass concentration; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; Sw Vernal grass; Sweet vernal grass

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

Sweet Vernal grass IgG (S) [Mass/Vol]Sweet Vernal grass IgG Ab [Mass/volume] in SerumSw Vernal grass IgG-mCncAnthoxanthum odoratum Ab.IgGALLERGYSweet vernal grass IgG antibodyMCnc

Frequently asked questions

Code details

Code99464-0

SystemLOINC

Display nameSweet Vernal grass IgG (S) [Mass/Vol]

DescriptionAnthoxanthum odoratum Ab.IgG

Short nameSw Vernal grass IgG-mCnc

ComponentAnthoxanthum odoratum 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

Sweet vernal grass IgG antibody

Part names

Anthoxanthum odoratum Ab.IgGMCncPtSerQnMass 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.