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 91841-7: Adenovirus Ag IA.rapid Ql (Lower resp)

Name: LOINC Code 91841-7: Adenovirus Ag IA.rapid Ql (Lower resp)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:21.442Z

91841-7 is a LOINC code used to identify Adenovirus Ag IA.rapid 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 Adenovirus 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 Adenovirus 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: IA.rapid

What it does not mean

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

Key facts

Adenovirus Ag [Presence] in Lower respiratory specimen by Rapid immunoassay
Adenovirus Ag
Adeno virus; Antigen; Antigens; Breathing; EIA; ELFA; ELISA; Enzyme immunoassay; HAdV; IAA; Low; Lower resp; Lungs; MEIA; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; RS; Screen; Spec; SUDS

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

Adenovirus Ag IA.rapid Ql (Lower resp)Adenovirus Ag [Presence] in Lower respiratory specimen by Rapid immunoassayHAdV Ag Lower resp Ql IA.rapidAdenovirus AgMICROAdenovirus antigen, Lower respiratoryPrThr

Frequently asked questions

Code details

Code91841-7

SystemLOINC

Display nameAdenovirus Ag IA.rapid Ql (Lower resp)

DescriptionAdenovirus Ag

Short nameHAdV Ag Lower resp Ql IA.rapid

ComponentAdenovirus Ag

PropertyPrThr

TimingPt

System (specimen)Respiratory system specimen.lower

ScaleOrd

MethodIA.rapid

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.66

Last changed2.77

Consumer names

Adenovirus antigen, Lower respiratory

Part names

Adenovirus AgPrThrPtRespiratory system specimen.lowerOrdIA.rapidPresence or ThresholdPoint in time (spot)Lower respiratory specimenRapid immunoassay

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.