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LOINC Code 21596-2: VZV IgM IF (CSF) [Titer]

21596-2 is a LOINC code used to identify VZV IgM 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 Varicella zoster virus Ab.IgM. 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 Varicella zoster virus Ab.IgM. 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

  • Varicella zoster virus IgM Ab [Titer] in Cerebral spinal fluid by Immunofluorescence
  • Varicella zoster virus Ab.IgM
  • ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; Chicken pox; Chicken pox virus; Chickenpox; Dilution factor; Dilution Factor (Titer); FA; Fluorescent antibody; Fluoresent; Herpes zoster; HHV-3; Human herpesvirus 3; ID; IFA; Immune fluorescence; Immune globulin M; Immunoflour; Immunofluor; Immunofluorescence; Immunoglobulin M; Infectious Disease; InfectiousDisease; Microbiology; Neuro; Neurology; Point in time; Random; Shingles; SmQn; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Time Resolved Fluorescence; Titer; Titered; Titre; TRF; Ttr; VZ; VZV; Zoster

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

VZV IgM IF (CSF) [Titer]Varicella zoster virus IgM Ab [Titer] in Cerebral spinal fluid by ImmunofluorescenceVZV IgM Titr CSF IFVaricella zoster virus Ab.IgMMICROVaricella zoster virus (VZV; Chickenpox) IgM antibody, Spinal fluidTitr

Frequently asked questions

Code details

Code21596-2
SystemLOINC
Display nameVZV IgM IF (CSF) [Titer]
DescriptionVaricella zoster virus Ab.IgM
Short nameVZV IgM Titr CSF IF
ComponentVaricella zoster virus Ab.IgM
PropertyTitr
TimingPt
System (specimen)CSF
ScaleSemiQn
MethodIF
ClassMICRO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Varicella zoster virus (VZV; Chickenpox) IgM antibody, Spinal fluid

Part names

Varicella zoster virus Ab.IgMTitrPtCSFSemiQnIFVaricella zoster virus IgMTiterPoint 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 21596-2 | HealthAssure