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.

LOINCActiveObservation

LOINC Code 42771-6: S. pneumoniae type IgG Nar (S) [Interp]

Name: LOINC Code 42771-6: S. pneumoniae type IgG Nar (S) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:28.129Z

42771-6 is a LOINC code used to identify S. pneumoniae type IgG Nar (S) [Interp] 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 serotype Ab.IgG. 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 serotype Ab.IgG. 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 serotype IgG Ab [Interpretation] in Serum Narrative
Streptococcus pneumoniae serotype Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; ID; Immune globulin G; Immunoglobulin G; Impression; Impression/interpretation of study; Impressions; Infectious Disease; InfectiousDisease; Interp; Interpretation; Microbiology; Narrative; Pneu; pneum; Pneumo; Pneumococ; Pneumococcal; Pneumococcal pneumonia; Pneumococcus; Pneumon; Pneumonia; Point in time; Random; Report; S pneum serotype; S pneumo; S pneumoniae; Serum; 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 type IgG Nar (S) [Interp]Streptococcus pneumoniae serotype IgG Ab [Interpretation] in Serum NarrativeS pneum serotype IgG Ser-ImpStreptococcus pneumoniae serotype Ab.IgGMICROInterpretation of Streptococcus pneumoniae serotype IgG antibody test result, BloodImp

Frequently asked questions

Code details

Code42771-6

SystemLOINC

Display nameS. pneumoniae type IgG Nar (S) [Interp]

DescriptionStreptococcus pneumoniae serotype Ab.IgG

Short nameS pneum serotype IgG Ser-Imp

ComponentStreptococcus pneumoniae serotype Ab.IgG

PropertyImp

TimingPt

System (specimen)Ser

ScaleNar

ClassMICRO

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.16

Last changed2.73

Consumer names

Interpretation of Streptococcus pneumoniae serotype IgG antibody test result, Blood

Part names

Streptococcus pneumoniae serotype Ab.IgGImpPtSerNarStreptococcus pneumoniae serotype IgGImpression/interpretation of studyPoint 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.