LOINCActiveBoth

LOINC Code 6446-9: L. pneumophila Ag LA Ql (Sput)

6446-9 is a LOINC code used to identify L. pneumophila Ag LA Ql (Sput) 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 Legionella pneumophila Ag. It is commonly used with the system or sample type Sputum.

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 Legionella pneumophila Ag. It is commonly used with the system or sample type Sputum.

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: LA

What it does not mean

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

Key facts

  • Legionella pneumophila Ag [Presence] in Sputum by Latex agglutination
  • Legionella pneumophila Ag
  • Antigen; Antigens; ID; Infectious Disease; InfectiousDisease; L pneumo; L pneumonphila; LAT; Latex agglutination; Legion; Legionela; Lower respiratory; Lung; Microbiology; Ordinal; Pneu; pneum; Pneumophilia; Point in time; PR; Pulmonary; Pulmonology; Ql; Qual; Qualitative; Random; Respiratory; Screen; Spt; Sputum

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

L. pneumophila Ag LA Ql (Sput)Legionella pneumophila Ag [Presence] in Sputum by Latex agglutinationL pneumo Ag Spt Ql LALegionella pneumophila AgMICROLegionella pneumophila antigen, SputumPrThr

Frequently asked questions

Code details

Code6446-9
SystemLOINC
Display nameL. pneumophila Ag LA Ql (Sput)
DescriptionLegionella pneumophila Ag
Short nameL pneumo Ag Spt Ql LA
ComponentLegionella pneumophila Ag
PropertyPrThr
TimingPt
System (specimen)Sputum
ScaleOrd
MethodLA
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0f
Last changed2.56

Consumer names

Legionella pneumophila antigen, Sputum

Part names

Legionella pneumophila AgPrThrPtSputumOrdLAPresence or ThresholdPoint in time (spot)Latex agglutination

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 6446-9 | HealthAssure