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.

LOINCBoth

LOINC Code 87353-9: A. pleuropneumoniae IgG/Positive control IA [Relative ratio]

Name: LOINC Code 87353-9: A. pleuropneumoniae IgG/Positive control IA [Relative ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:15.845Z

87353-9 is a LOINC code used to identify A. pleuropneumoniae IgG/Positive control IA [Relative 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 Actinobacillus pleuropneumoniae Ab.IgG/Positive control. It is commonly used with the system or sample type -.

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 Actinobacillus pleuropneumoniae Ab.IgG/Positive control. It is commonly used with the system or sample type -.

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: Both
Method: IA

What it does not mean

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

Key facts

Deprecated Actinobacillus pleuropneumoniae IgG Ab/Positive control by Immunoassay
Actinobacillus pleuropneumoniae Ab.IgG/Positive control
A pleuropn; A pleuropneumoniae; ABS; Aby; Actino; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Contagious swine pleuropneumonia; EIA; ELFA; ELISA; Enzyme immunoassay; IAA; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Point in time; Pos; Pos cntrl; QNT; Quan; Quant; Quantitative; Random; Relative ratio; SUDS; Vet; Veterinary

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

A. pleuropneumoniae IgG/Positive control IA [Relative ratio]Deprecated Actinobacillus pleuropneumoniae IgG Ab/Positive control by ImmunoassayDeprecated A pleuropn IgG/Pos cntrl IAActinobacillus pleuropneumoniae Ab.IgG/Positive controlMICROActinobacillus pleuropneumoniae/Positive ControlRelRto

Frequently asked questions

Code details

Code87353-9

SystemLOINC

Display nameA. pleuropneumoniae IgG/Positive control IA [Relative ratio]

DescriptionActinobacillus pleuropneumoniae Ab.IgG/Positive control

Short nameDeprecated A pleuropn IgG/Pos cntrl IA

ComponentActinobacillus pleuropneumoniae Ab.IgG/Positive control

PropertyRelRto

TimingPt

System (specimen)-

ScaleQn

MethodIA

ClassMICRO

Example unitsratio

StatusDEPRECATED

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.63

Last changed2.66

Consumer names

Actinobacillus pleuropneumoniae/Positive Control

Part names

Actinobacillus pleuropneumoniae Ab.IgG/Positive controlRelRtoPt-QnIARelative RatioPoint in time (spot)Immunoassay

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.