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 30347-9: Glutamate decarboxylase 65 Ab (S) [Moles/Vol]

Name: LOINC Code 30347-9: Glutamate decarboxylase 65 Ab (S) [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

30347-9 is a LOINC code used to identify Glutamate decarboxylase 65 Ab (S) [Moles/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 Glutamate decarboxylase 65 Ab. 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 Glutamate decarboxylase 65 Ab. 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

Glutamate decarboxylase 65 Ab [Moles/volume] in Serum
Glutamate decarboxylase 65 Ab
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Autoimmune myelopathy; c707; Endocrine; Endocrinology; GAD; GAD65; GAD-65; GADA; Glu; Glutamic acid; Glutamic acid decarboxylase-65; Insulin-Dependent Diabetes Mellitus; Level; Paraneoplastic neurological syndrome; Point in time; QNT; Quan; Quant; Quantitative; Random; Serology; Serum; SR; Substance concentration

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 Glutamate decarboxylase 65 Ab (S) [Moles/Vol] (30347-9)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Glutamate decarboxylase 65 Ab (S) [Moles/Vol]Glutamate decarboxylase 65 Ab [Moles/volume] in SerumGAD65 Ab Ser-sCncGlutamate decarboxylase 65 AbSEROGlutamate decarboxylase 65 antibody, BloodSCnc

Frequently asked questions

Code details

Code30347-9

SystemLOINC

Display nameGlutamate decarboxylase 65 Ab (S) [Moles/Vol]

DescriptionGlutamate decarboxylase 65 Ab

Short nameGAD65 Ab Ser-sCnc

ComponentGlutamate decarboxylase 65 Ab

PropertySCnc

TimingPt

System (specimen)Ser

ScaleQn

ClassSERO

Example unitsnmol/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.04

Last changed2.73

Consumer names

Glutamate decarboxylase 65 antibody, Blood

Part names

Glutamate decarboxylase 65 AbSCncPtSerQnSubstance 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.