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 51473-7: S. pneumoniae capsular polysaccharide IgG2 (S) [Mass/Vol]

Name: LOINC Code 51473-7: S. pneumoniae capsular polysaccharide IgG2 (S) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:35.012Z

51473-7 is a LOINC code used to identify S. pneumoniae capsular polysaccharide IgG2 (S) [Mass/Vol] 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 capsular polysaccharide Ab.IgG2. 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 capsular polysaccharide Ab.IgG2. 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

Streptococcus pneumoniae capsular polysaccharide IgG2 Ab [Mass/volume] in Serum
Streptococcus pneumoniae capsular polysaccharide Ab.IgG2
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Capsule; ID; Infectious Disease; InfectiousDisease; Level; Mass concentration; Microbiology; Pneu; pneum; Pneumo; Pneumococ; Pneumococcal; Pneumococcal pneumonia; Pneumococcus; Pneumon; Pneumonia; Point in time; QNT; Quan; Quant; Quantitative; Random; S pneum CPS; S pneumo; S pneumoniae; Serum; Spn; SR; Strep; Strept; Streptococcus pneumoniae CPS

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 capsular polysaccharide IgG2 (S) [Mass/Vol]Streptococcus pneumoniae capsular polysaccharide IgG2 Ab [Mass/volume] in SerumS pneum CPS IgG2 Ser-mCncStreptococcus pneumoniae capsular polysaccharide Ab.IgG2MICROStreptococcus pneumoniae capsular polysaccharide IgG2, BloodMCnc

Frequently asked questions

Code details

Code51473-7

SystemLOINC

Display nameS. pneumoniae capsular polysaccharide IgG2 (S) [Mass/Vol]

DescriptionStreptococcus pneumoniae capsular polysaccharide Ab.IgG2

Short nameS pneum CPS IgG2 Ser-mCnc

ComponentStreptococcus pneumoniae capsular polysaccharide Ab.IgG2

PropertyMCnc

TimingPt

System (specimen)Ser

ScaleQn

ClassMICRO

Example unitsug/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.34

Consumer names

Streptococcus pneumoniae capsular polysaccharide IgG2, Blood

Part names

Streptococcus pneumoniae capsular polysaccharide Ab.IgG2MCncPtSerQnStreptococcus pneumoniae capsular polysaccharide IgG2Mass 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.