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LOINC Code 76489-4: IgG (CSF) [Moles/Vol]

76489-4 is a LOINC code used to identify IgG (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 IgG. 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 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: ACTIVE
  • Order vs observation: Both

What it does not mean

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

Key facts

IgG [Moles/volume] in Cerebral spinal fluid
IgG
IgG in CSF is used to evaluate central nervous system (CNS) infections, neoplasms or primary neurologic diseases (exmultiple sclerosis). CSF IgG is increased with increased blood-brain barrier permeability and/or local intrathecal IgG production. This term was created for, but not limited in use to, the cobas Tina-quant IgG Gen.2 test kit.
Cerebral spinal fluid; Cerebrospinal Fl; Chemistry; Immune globulin G; Immunoglobulin G; Level; Neuro; Neurology; Point in time; QNT; Quan; Quant; Quantitative; Random; 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

IgG (CSF) [Moles/Vol]IgG [Moles/volume] in Cerebral spinal fluidIgG CSF-sCncIgGCHEMIgG, Spinal fluidSCnc

Frequently asked questions

Code details

Code76489-4
SystemLOINC
Display nameIgG (CSF) [Moles/Vol]
DescriptionIgG
Short nameIgG CSF-sCnc
ComponentIgG
PropertySCnc
TimingPt
System (specimen)CSF
ScaleQn
ClassCHEM
Example unitsumol/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.52
Last changed2.52

Consumer names

IgG, Spinal fluid

Part names

IgGSCncPtCSFQnSubstance 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 76489-4 | HealthAssure