HealthAssure
HealthAssureGood Life
LOINCActiveBoth

LOINC Code 53708-4: Glutamate decarboxylase 65 Ab (CSF) [Moles/Vol]

53708-4 is a LOINC code used to identify Glutamate decarboxylase 65 Ab (CSF) [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 CSF.

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 CSF.

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 Cerebral spinal fluid
Glutamate decarboxylase 65 Ab
Glutamic acid decarboxylase (GAD65) is an enzyme that is produced primarily by pancreatic islet cells. Glutamic Acid Decarboxylase antibodies are present in the majority of individuals with new-onset diabetes and in individuals in the prediabetic phase of the disease. It appears early in the disease process prior to clinical symptoms and can be used to predict who will develop IDDM (insulin-dependent diabetes mellitus). Measurement of GAD65 antibody can be of use in distinguishing insulin-dependent from non-insulin dependent diabetics when the clinical history is ambiguous. GAD65 autoantibodies are often markedly elevated in patients with the stiff-person syndrome (also known as stiff-man syndrome), a condition that is associated with fluctuating stiffness and paroxysmal spasms of the trunk and legs. Information from httpwww.labcorp.com (Laboratory Corporation of America), accessed 2008 02 13.
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Autoimmune myelopathy; c707; Cerebral spinal fluid; Cerebrospinal Fl; GAD; GAD65; GAD-65; GADA; Glu; Glutamic acid; Glutamic acid decarboxylase-65; Insulin-Dependent Diabetes Mellitus; Level; Neuro; Neurology; Paraneoplastic neurological syndrome; Point in time; QNT; Quan; Quant; Quantitative; Random; Serology; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; 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.

Common synonyms

Glutamate decarboxylase 65 Ab (CSF) [Moles/Vol]Glutamate decarboxylase 65 Ab [Moles/volume] in Cerebral spinal fluidGAD65 Ab CSF-sCncGlutamate decarboxylase 65 AbSEROGlutamate decarboxylase 65 antibody, Spinal fluidSCnc

Frequently asked questions

Code details

Code53708-4
SystemLOINC
Display nameGlutamate decarboxylase 65 Ab (CSF) [Moles/Vol]
DescriptionGlutamate decarboxylase 65 Ab
Short nameGAD65 Ab CSF-sCnc
ComponentGlutamate decarboxylase 65 Ab
PropertySCnc
TimingPt
System (specimen)CSF
ScaleQn
ClassSERO
Example unitsnmol/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.26
Last changed2.73

Consumer names

Glutamate decarboxylase 65 antibody, Spinal fluid

Part names

Glutamate decarboxylase 65 AbSCncPtCSFQnSubstance ConcentrationPoint in time (spot)Cerebral spinal fluid

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.

LOINC Code 53708-4 | HealthAssure