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.

LOINC

LOINC Code 27405-0: S. pneumoniae 56 IgG (S) [Mass/Vol]

Name: LOINC Code 27405-0: S. pneumoniae 56 IgG (S) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:14.571Z

27405-0 is a LOINC code used to identify S. pneumoniae 56 IgG (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 56 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 56 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: DEPRECATED

What it does not mean

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

Key facts

Deprecated Streptococcus pneumoniae 56 IgG Ab [Mass/volume] in Serum
Streptococcus pneumoniae 56 Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; ID; Immune globulin G; Immunoglobulin G; 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 pneum56; S pneumo; S pneumoniae; Serum; Spn; SR; Strep; Strept; Streptococcus pneumoniae 18c

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 56 IgG (S) [Mass/Vol]Deprecated Streptococcus pneumoniae 56 IgG Ab [Mass/volume] in SerumDeprecated S pneum56 IgG Ser-mCncStreptococcus pneumoniae 56 Ab.IgGMICROStreptococcus pneumoniae 56 IgG antibody, BloodMCnc

Frequently asked questions

Code details

Code27405-0

SystemLOINC

Display nameS. pneumoniae 56 IgG (S) [Mass/Vol]

DescriptionStreptococcus pneumoniae 56 Ab.IgG

Short nameDeprecated S pneum56 IgG Ser-mCnc

ComponentStreptococcus pneumoniae 56 Ab.IgG

PropertyMCnc

TimingPt

System (specimen)Ser

ScaleQn

ClassMICRO

Example unitsug/mL

StatusDEPRECATED

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.00

Last changed2.70

Consumer names

Streptococcus pneumoniae 56 IgG antibody, Blood

Part names

Streptococcus pneumoniae 56 Ab.IgGMCncPtSerQnStreptococcus pneumoniae 56 IgGMass 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.