LOINCActiveObservation

LOINC Code 22563-1: S. pneumoniae IgG 1st specimen/2nd specimen (S) [Ratio]

22563-1 is a LOINC code used to identify S. pneumoniae IgG 1st specimen/2nd 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 Ab.IgG^1st specimen/2nd 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 Ab.IgG^1st specimen/2nd 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: ACTIVE
  • Order vs observation: Observation

What it does not mean

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

Key facts

Streptococcus pneumoniae IgG Ab [Ratio] in Serum --1st specimen/2nd specimen
Streptococcus pneumoniae Ab.IgG^1st specimen/2nd specimen
12; 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 pneumo; S pneumoniae; Second; Serum; sp1; sp2; 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 IgG 1st specimen/2nd specimen (S) [Ratio]Streptococcus pneumoniae IgG Ab [Ratio] in Serum --1st specimen/2nd specimenS pneum IgG 1:2 Ser-RtoStreptococcus pneumoniae Ab.IgG^1st specimen/2nd specimenMICROStreptococcus pneumoniae IgG antibody 1st specimen/2nd specimen, BloodRatio

Frequently asked questions

Code details

Code22563-1
SystemLOINC
Display nameS. pneumoniae IgG 1st specimen/2nd specimen (S) [Ratio]
DescriptionStreptococcus pneumoniae Ab.IgG^1st specimen/2nd specimen
Short nameS pneum IgG 1:2 Ser-Rto
ComponentStreptococcus pneumoniae Ab.IgG^1st specimen/2nd specimen
PropertyRatio
TimingPt
System (specimen)Ser
ScaleQn
ClassMICRO
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0n
Last changed2.73

Consumer names

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

Part names

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