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.

LOINCActiveBoth

LOINC Code 25840-0: HSV 2 Ab IF (CSF) [Titer]

Name: LOINC Code 25840-0: HSV 2 Ab IF (CSF) [Titer]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

25840-0 is a LOINC code used to identify HSV 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 Herpes simplex virus 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 Herpes simplex virus 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

Herpes simplex virus 2 Ab [Titer] in Cerebral spinal fluid by Immunofluorescence
Herpes simplex virus 2 Ab
ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; Dilution factor; Dilution Factor (Titer); FA; Fluorescent antibody; Fluoresent; Herp splx; Herpes simplex virus type 2; Herpes simplex virus type II; HSV; HSV2; ID; IFA; II; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Infectious Disease; InfectiousDisease; Microbiology; Neuro; Neurology; Point in time; Random; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for HSV 2 Ab IF (CSF) [Titer] (25840-0)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

HSV 2 Ab IF (CSF) [Titer]Herpes simplex virus 2 Ab [Titer] in Cerebral spinal fluid by ImmunofluorescenceHSV2 Ab Titr CSF IFHerpes simplex virus 2 AbMICROHerpes simplex virus 2 (HSV 2) antibody, Spinal fluidTitr

Frequently asked questions

Code details

Code25840-0

SystemLOINC

Display nameHSV 2 Ab IF (CSF) [Titer]

DescriptionHerpes simplex virus 2 Ab

Short nameHSV2 Ab Titr CSF IF

ComponentHerpes simplex virus 2 Ab

PropertyTitr

TimingPt

System (specimen)CSF

ScaleSemiQn

MethodIF

ClassMICRO

Example unitstiter

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.00

Last changed2.75

Consumer names

Herpes simplex virus 2 (HSV 2) antibody, Spinal fluid

Part names

Herpes simplex virus 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.