LOINCOrder

LOINC Code 109691-6: FLUAV Ag (Nph) [Measurement]

109691-6 is a LOINC code used to identify FLUAV Ag (Nph) [Measurement] 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 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 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: TRIAL
  • Order vs observation: Order

What it does not mean

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

Key facts

Influenza virus A Ag [Measurement] in Nasopharynx
Influenza virus A Ag
This term is intended to collate similar measurements for the LOINC SNOMED CT Collaboration in an ontological view. Additionally, it can be used to communicate a laboratory order, either alone or in combination with specimen or other information in the order. It may NOT be used to report back the measured patient value. [https//lo.inc/ce2mb6]
Antigen; Antigens; Avian influenza; Bird flu; FLUA; FLUAV; FLUV; Fowl plague; Influ; Influenza A; Influenza A virus; Lab orders; Msmt; Nasopharynx

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 (Nph) [Measurement]Influenza virus A Ag [Measurement] in NasopharynxFLUAV Ag Msmt NphInfluenza virus A AgLABORDERS.ONTOLOGYInfluenza A (Flu A) antigen, Nasopharynx{Measurement}

Frequently asked questions

Code details

Code109691-6
SystemLOINC
Display nameFLUAV Ag (Nph) [Measurement]
DescriptionInfluenza virus A Ag
Short nameFLUAV Ag Msmt Nph
ComponentInfluenza virus A Ag
Property{Measurement}
Timing-
System (specimen)Nph
Scale-
ClassLABORDERS.ONTOLOGY
StatusTRIAL
Order/ObservationOrder

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.81
Last changed2.81

Consumer names

Influenza A (Flu A) antigen, Nasopharynx

Part names

Influenza virus A Ag{Measurement}-NphMeasurementNasopharynx

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 109691-6 | HealthAssure