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LOINC Code 24401-2: Neuronal nuclear type 2 Ab IF (CSF) [Titer]

24401-2 is a LOINC code used to identify Neuronal nuclear type 2 Ab IF (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 Neuronal nuclear type 2 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 Neuronal nuclear type 2 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
  • Method: IF

What it does not mean

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

Key facts

  • Neuronal nuclear type 2 Ab [Titer] in Cerebral spinal fluid by Immunofluorescence
  • Neuronal nuclear type 2 Ab
  • ABS; Aby; ACIF; ANNA 2; ANNA-2; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; Dilution factor; Dilution Factor (Titer); FA; FANA; Fluorescent antibody; Fluoresent; Hu; Hu2; IFA; II; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Neuro; Neurology; Neuronal nuclear type II; Nuc; Paraneoplastic syndrome; Point in time; Random; RI; Serology; SmQn; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Time Resolved Fluorescence; Titer; Titered; Titre; TRF; 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

Neuronal nuclear type 2 Ab IF (CSF) [Titer]Neuronal nuclear type 2 Ab [Titer] in Cerebral spinal fluid by ImmunofluorescenceHu2 Ab Titr CSF IFNeuronal nuclear type 2 AbSERONeuronal nuclear type 2 antibody, Spinal fluidTitr

Frequently asked questions

Code details

Code24401-2
SystemLOINC
Display nameNeuronal nuclear type 2 Ab IF (CSF) [Titer]
DescriptionNeuronal nuclear type 2 Ab
Short nameHu2 Ab Titr CSF IF
ComponentNeuronal nuclear type 2 Ab
PropertyTitr
TimingPt
System (specimen)CSF
ScaleSemiQn
MethodIF
ClassSERO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0o
Last changed2.75

Consumer names

Neuronal nuclear type 2 antibody, Spinal fluid

Part names

Neuronal nuclear type 2 AbTitrPtCSFSemiQnIFTiterPoint in time (spot)Cerebral spinal fluidImmunofluorescence (IF)

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 24401-2 | HealthAssure