LOINCObservation

LOINC Code 47341-3: S. pneumoniae 34 IgG 2nd specimen/1st specimen (S) [Ratio]

47341-3 is a LOINC code used to identify S. pneumoniae 34 IgG 2nd specimen/1st specimen (S) [Ratio] 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 34 Ab.IgG^2nd specimen/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 34 Ab.IgG^2nd specimen/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 34 IgG Ab [Ratio] in Serum --2nd specimen/1st specimen
Streptococcus pneumoniae 34 Ab.IgG^2nd specimen/1st specimen
21; ABS; Aby; Acute specimen; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Convalescent; First; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; Microbiology; Pneu; pneum; Pneumo; Pneumococ; Pneumococcal; Pneumococcal pneumonia; Pneumococcus; Pneumon; Pneumonia; Point in time; Post immunization; Pre immunization; QNT; Quan; Quant; Quantitative; Random; Ratios; Rto; S pneum34; S pneumo; S pneumoniae; Second; Serum; sp1; sp2; Spec; Spn; SR; Strep; Strept; Streptococcus pneumoniae 10a

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 34 IgG 2nd specimen/1st specimen (S) [Ratio]Deprecated Streptococcus pneumoniae 34 IgG Ab [Ratio] in Serum --2nd specimen/1st specimenDeprecated S pneum34 IgG 2:1 Ser-RtoStreptococcus pneumoniae 34 Ab.IgG^2nd specimen/1st specimenMICROStreptococcus pneumoniae 34 IgG antibody 2nd specimen/1st specimen, BloodRatio

Frequently asked questions

Code details

Code47341-3
SystemLOINC
Display nameS. pneumoniae 34 IgG 2nd specimen/1st specimen (S) [Ratio]
DescriptionStreptococcus pneumoniae 34 Ab.IgG^2nd specimen/1st specimen
Short nameDeprecated S pneum34 IgG 2:1 Ser-Rto
ComponentStreptococcus pneumoniae 34 Ab.IgG^2nd specimen/1st specimen
PropertyRatio
TimingPt
System (specimen)Ser
ScaleQn
ClassMICRO
StatusDEPRECATED
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.19
Last changed2.70

Consumer names

Streptococcus pneumoniae 34 IgG antibody 2nd specimen/1st specimen, Blood

Part names

Streptococcus pneumoniae 34 Ab.IgG^2nd specimen/1st specimenRatioPtSerQnPoint 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.