LOINCActiveBoth

LOINC Code 43874-7: FLUAV Ag Ql (Nph)

43874-7 is a LOINC code used to identify FLUAV Ag Ql (Nph) 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 Influenza virus A Ag. It is commonly used with the system or sample type Nph.

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 Influenza virus A Ag. It is commonly used with the system or sample type Nph.

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

What it does not mean

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

Key facts

  • Influenza virus A Ag [Presence] in Nasopharynx
  • Influenza virus A Ag
  • Antigen; Antigens; Avian influenza; Bird flu; FLUA; FLUAV; FLUV; Fowl plague; ID; Infectious Disease; InfectiousDisease; Influ; Influenza A; Influenza A virus; Microbiology; Nasopharynx; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen

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

FLUAV Ag Ql (Nph)Influenza virus A Ag [Presence] in NasopharynxFLUAV Ag Nph QlInfluenza virus A AgMICROInfluenza A (Flu A) antigen, NasopharynxPrThr

Frequently asked questions

Code details

Code43874-7
SystemLOINC
Display nameFLUAV Ag Ql (Nph)
DescriptionInfluenza virus A Ag
Short nameFLUAV Ag Nph Ql
ComponentInfluenza virus A Ag
PropertyPrThr
TimingPt
System (specimen)Nph
ScaleOrd
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.17
Last changed2.73

Consumer names

Influenza A (Flu A) antigen, Nasopharynx

Part names

Influenza virus A AgPrThrPtNphOrdPresence or ThresholdPoint in time (spot)Nasopharynx

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 43874-7 | HealthAssure