LOINCActiveBoth

LOINC Code 9533-1: FLUAV IgM (S) [Titer]

9533-1 is a LOINC code used to identify FLUAV IgM (S) [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 Influenza virus A Ab.IgM. It is commonly used with the system or sample type Ser.

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 Ab.IgM. It is commonly used with the system or sample type Ser.

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 IgM Ab [Titer] in Serum
  • Influenza virus A Ab.IgM
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Avian influenza; Bird flu; Dilution factor; Dilution Factor (Titer); FLUA; FLUAV; FLUV; Fowl plague; ID; Immune globulin M; Immunoglobulin M; Infectious Disease; InfectiousDisease; Influ; Influenza A; Influenza A virus; Microbiology; Point in time; Random; Serum; SmQn; SR; Titer; Titered; Titre; 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.

Common synonyms

FLUAV IgM (S) [Titer]Influenza virus A IgM Ab [Titer] in SerumFLUAV IgM Titr SerInfluenza virus A Ab.IgMMICROInfluenza A (Flu A) IgM antibody, BloodTitr

Frequently asked questions

Code details

Code9533-1
SystemLOINC
Display nameFLUAV IgM (S) [Titer]
DescriptionInfluenza virus A Ab.IgM
Short nameFLUAV IgM Titr Ser
ComponentInfluenza virus A Ab.IgM
PropertyTitr
TimingPt
System (specimen)Ser
ScaleSemiQn
ClassMICRO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0i
Last changed2.75

Consumer names

Influenza A (Flu A) IgM antibody, Blood

Part names

Influenza virus A Ab.IgMTitrPtSerSemiQnInfluenza virus A IgMTiterPoint in time (spot)Serum

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 9533-1 | HealthAssure