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 91834-2: HSV 2 Ag IF Ql (Lower resp)

Name: LOINC Code 91834-2: HSV 2 Ag IF Ql (Lower resp)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:21.442Z

91834-2 is a LOINC code used to identify HSV 2 Ag IF Ql (Lower resp) 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 Ag. It is commonly used with the system or sample type Respiratory system specimen.lower.

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 Herpes simplex virus 2 Ag. It is commonly used with the system or sample type Respiratory system specimen.lower.

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 Ag [Presence] in Lower respiratory specimen by Immunofluorescence
Herpes simplex virus 2 Ag
ACIF; Anticomplement Immunofluorescence; Antigen; Antigens; Breathing; DFA; FA; Fluorescent antibody; Fluoresent; Herp splx; Herpes simplex virus type 2; Herpes simplex virus type II; HSV; HSV2; IFA; II; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Low; Lower resp; Lungs; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; RS; Screen; Spec; Time Resolved Fluorescence; TRF

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

HSV 2 Ag IF Ql (Lower resp)Herpes simplex virus 2 Ag [Presence] in Lower respiratory specimen by ImmunofluorescenceHSV2 Ag Lower resp Ql IFHerpes simplex virus 2 AgMICROHerpes simplex virus 2 (HSV 2) antigen, Lower respiratoryPrThr

Frequently asked questions

Code details

Code91834-2

SystemLOINC

Display nameHSV 2 Ag IF Ql (Lower resp)

DescriptionHerpes simplex virus 2 Ag

Short nameHSV2 Ag Lower resp Ql IF

ComponentHerpes simplex virus 2 Ag

PropertyPrThr

TimingPt

System (specimen)Respiratory system specimen.lower

ScaleOrd

MethodIF

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.66

Last changed2.77

Consumer names

Herpes simplex virus 2 (HSV 2) antigen, Lower respiratory

Part names

Herpes simplex virus 2 AgPrThrPtRespiratory system specimen.lowerOrdIFPresence or ThresholdPoint in time (spot)Lower respiratory specimenImmunofluorescence (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.