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.

LOINCObservation

LOINC Code 31677-8: Tetrasialylganglioside GQ1b IgG Ql (CSF)

Name: LOINC Code 31677-8: Tetrasialylganglioside GQ1b IgG Ql (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:17.665Z

31677-8 is a LOINC code used to identify Tetrasialylganglioside GQ1b IgG Ql (CSF) 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 Tetrasialylganglioside GQ1b Ab.IgG. It is commonly used with the system or sample type CSF.

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 Tetrasialylganglioside GQ1b Ab.IgG. 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: DEPRECATED
Order vs observation: Observation

What it does not mean

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

Key facts

Deprecated Tetrasialylganglioside GQ1b IgG Ab [Presence] in Cerebral spinal fluid
Tetrasialylganglioside GQ1b Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; GQ1b; Immune globulin G; Immunoglobulin G; Ordinal; Point in time; QL; Qual; Qualitative; Random; Screen; Serology; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid

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

Tetrasialylganglioside GQ1b IgG Ql (CSF)Deprecated Tetrasialylganglioside GQ1b IgG Ab [Presence] in Cerebral spinal fluidDeprecated GQ1b Tetra IgG CSF QlTetrasialylganglioside GQ1b Ab.IgGSEROTetrasialylganglioside GQ1b IgG antibody, Spinal fluidACnc

Frequently asked questions

Code details

Code31677-8

SystemLOINC

Display nameTetrasialylganglioside GQ1b IgG Ql (CSF)

DescriptionTetrasialylganglioside GQ1b Ab.IgG

Short nameDeprecated GQ1b Tetra IgG CSF Ql

ComponentTetrasialylganglioside GQ1b Ab.IgG

PropertyACnc

TimingPt

System (specimen)CSF

ScaleOrd

ClassSERO

StatusDEPRECATED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.07

Last changed2.36

Consumer names

Tetrasialylganglioside GQ1b IgG antibody, Spinal fluid

Part names

Tetrasialylganglioside GQ1b Ab.IgGACncPtCSFOrdTetrasialylganglioside GQ1b IgGArbitrary 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.