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 73685-0: S. pneumoniae Ag LA Ql (Isol)

Name: LOINC Code 73685-0: S. pneumoniae Ag LA Ql (Isol)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

73685-0 is a LOINC code used to identify S. pneumoniae Ag LA Ql (Isol) 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 Streptococcus pneumoniae Ag. It is commonly used with the system or sample type Isolate.

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 Streptococcus pneumoniae Ag. It is commonly used with the system or sample type Isolate.

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

Streptococcus pneumoniae Ag [Presence] in Isolate by Latex agglutination
Streptococcus pneumoniae Ag
Antigen; Antigens; ID; Infectious Disease; InfectiousDisease; InternalLabUse; Islt; Isol; LAT; Latex agglutination; Microbiology; Ordinal; Pneu; pneum; Pneumo; Pneumococ; Pneumococcal; Pneumococcal pneumonia; Pneumococcus; Pneumon; Pneumonia; Point in time; PR; QL; Qual; Qualitative; Random; S pneumo; S pneumoniae; Screen; Spn; Strep; Strept

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for S. pneumoniae Ag LA Ql (Isol) (73685-0)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

S. pneumoniae Ag LA Ql (Isol)Streptococcus pneumoniae Ag [Presence] in Isolate by Latex agglutinationS pneum Ag Islt Ql LAStreptococcus pneumoniae AgMICROStreptococcus pneumoniae antigenPrThr

Frequently asked questions

Code details

Code73685-0

SystemLOINC

Display nameS. pneumoniae Ag LA Ql (Isol)

DescriptionStreptococcus pneumoniae Ag

Short nameS pneum Ag Islt Ql LA

ComponentStreptococcus pneumoniae Ag

PropertyPrThr

TimingPt

System (specimen)Isolate

ScaleOrd

MethodLA

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.44

Last changed2.56

Consumer names

Streptococcus pneumoniae antigen

Part names

Streptococcus pneumoniae AgPrThrPtIsolateOrdLAPresence 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.