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LOINC Code 51408-3: S. pneumoniae capsular polysaccharide IgG2 IA (S) [Mass/Vol]

51408-3 is a LOINC code used to identify S. pneumoniae capsular polysaccharide IgG2 IA (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
  • Method: IA

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 by Immunoassay
  • Streptococcus pneumoniae capsular polysaccharide Ab.IgG2
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Capsule; EIA; ELFA; ELISA; Enzyme immunoassay; IAA; ID; Infectious Disease; InfectiousDisease; Level; Mass concentration; MEIA; 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; SUDS

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

Frequently asked questions

Code details

Code51408-3
SystemLOINC
Display nameS. pneumoniae capsular polysaccharide IgG2 IA (S) [Mass/Vol]
DescriptionStreptococcus pneumoniae capsular polysaccharide Ab.IgG2
Short nameS pneum CPS IgG2 Ser IA-mCnc
ComponentStreptococcus pneumoniae capsular polysaccharide Ab.IgG2
PropertyMCnc
TimingPt
System (specimen)Ser
ScaleQn
MethodIA
ClassMICRO
Example unitsmg/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.22
Last changed2.70

Consumer names

Streptococcus pneumoniae capsular polysaccharide IgG2, Blood

Part names

Streptococcus pneumoniae capsular polysaccharide Ab.IgG2MCncPtSerQnIAStreptococcus pneumoniae capsular polysaccharide IgG2Mass ConcentrationPoint in time (spot)SerumImmunoassay

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.