LOINCActiveBoth

LOINC Code 101871-2: IgLON5 IgG Cell binding immunofluorescent assay (CSF) [Titer]

101871-2 is a LOINC code used to identify IgLON5 IgG Cell binding immunofluorescent assay (CSF) [Titer] 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 IgLON family member 5 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 IgLON family member 5 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: ACTIVE
  • Order vs observation: Both
  • Method: CBA IFA

What it does not mean

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

Key facts

  • IgLON5 IgG Ab [Titer] in Cerebral spinal fluid by Cell binding immunofluorescent assay
  • IgLON family member 5 Ab.IgG
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; Dilution factor; Dilution Factor (Titer); IgLON5; IgLON5 Ab; IgLON5 IgG; Immune globulin G; Immunoglobulin G; Indirect Fluorescence Antibody; Point in time; Random; Serology; SmQn; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Titer; Titered; Titre; Ttr

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

IgLON5 IgG Cell binding immunofluorescent assay (CSF) [Titer]IgLON5 IgG Ab [Titer] in Cerebral spinal fluid by Cell binding immunofluorescent assayIgLON5 IgG Titr CSF CBA IFAIgLON family member 5 Ab.IgGSEROIgLON5 IgG antibody, Spinal fluidTitr

Frequently asked questions

Code details

Code101871-2
SystemLOINC
Display nameIgLON5 IgG Cell binding immunofluorescent assay (CSF) [Titer]
DescriptionIgLON family member 5 Ab.IgG
Short nameIgLON5 IgG Titr CSF CBA IFA
ComponentIgLON family member 5 Ab.IgG
PropertyTitr
TimingPt
System (specimen)CSF
ScaleSemiQn
MethodCBA IFA
ClassSERO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.75
Last changed2.76

Consumer names

IgLON5 IgG antibody, Spinal fluid

Part names

IgLON family member 5 Ab.IgGTitrPtCSFSemiQnCBA IFAIgLON5 IgGTiterPoint in time (spot)Cerebral spinal fluidCell binding immunofluorescent assay

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 101871-2 | HealthAssure