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.

LOINCObservation

LOINC Code 13143-3: S. pneumoniae 4 Ab spec 1 Qn (S)

Name: LOINC Code 13143-3: S. pneumoniae 4 Ab spec 1 Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:23.609Z

13143-3 is a LOINC code used to identify S. pneumoniae 4 Ab spec 1 Qn (S) 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 4 Ab^1st specimen. It is commonly used with the system or sample type Ser.

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 Streptococcus pneumoniae 4 Ab^1st specimen. 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: DEPRECATED
Order vs observation: Observation

What it does not mean

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

Key facts

Deprecated Streptococcus pneumoniae 4 Ab [Units/volume] in Serum --1st specimen
Streptococcus pneumoniae 4 Ab^1st specimen
ABS; Aby; Acute specimen; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; First; ID; Infectious Disease; InfectiousDisease; Microbiology; Pneu; pneum; Pneumo; Pneumococ; Pneumococcal; Pneumococcal pneumonia; Pneumococcus; Pneumon; Pneumonia; Point in time; Pre immunization; QNT; Quan; Quant; Quantitative; Random; S pneum4; S pneumo; S pneumoniae; Serum; sp1; Spec; Spn; SR; 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.

Common synonyms

S. pneumoniae 4 Ab spec 1 Qn (S)Deprecated Streptococcus pneumoniae 4 Ab [Units/volume] in Serum --1st specimenDeprecated S pneum4 Ab sp1 Ser-aCncStreptococcus pneumoniae 4 Ab^1st specimenMICROStreptococcus pneumoniae 4 antibody specimen 1, BloodACnc

Frequently asked questions

Code details

Code13143-3

SystemLOINC

Display nameS. pneumoniae 4 Ab spec 1 Qn (S)

DescriptionStreptococcus pneumoniae 4 Ab^1st specimen

Short nameDeprecated S pneum4 Ab sp1 Ser-aCnc

ComponentStreptococcus pneumoniae 4 Ab^1st specimen

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

ClassMICRO

StatusDEPRECATED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0j-a

Last changed2.69

Consumer names

Streptococcus pneumoniae 4 antibody specimen 1, Blood

Part names

Streptococcus pneumoniae 4 Ab^1st specimenACncPtSerQnArbitrary ConcentrationPoint 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.