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.

LOINCActiveBoth

LOINC Code 5312-4: R. spotted fever group IgG IA Qn (S)

Name: LOINC Code 5312-4: R. spotted fever group IgG IA Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:36.029Z

5312-4 is a LOINC code used to identify R. spotted fever group IgG IA Qn (S) 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 Rickettsia spotted fever group 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 Rickettsia spotted fever group 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: Both
Method: IA

What it does not mean

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

Key facts

Rickettsia spotted fever group IgG Ab [Units/volume] in Serum by Immunoassay
Rickettsia spotted fever group Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; EIA; ELFA; ELISA; Enzyme immunoassay; IAA; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Rick SF; Ricket; Rickettsial; Serum; SR; SUDS

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

R. spotted fever group IgG IA Qn (S)Rickettsia spotted fever group IgG Ab [Units/volume] in Serum by ImmunoassayRick SF IgG Ser IA-aCncRickettsia spotted fever group Ab.IgGMICRORickettsia spotted fever group IgG antibody, BloodACnc

Frequently asked questions

Code details

Code5312-4

SystemLOINC

Display nameR. spotted fever group IgG IA Qn (S)

DescriptionRickettsia spotted fever group Ab.IgG

Short nameRick SF IgG Ser IA-aCnc

ComponentRickettsia spotted fever group Ab.IgG

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

MethodIA

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.69

Consumer names

Rickettsia spotted fever group IgG antibody, Blood

Part names

Rickettsia spotted fever group Ab.IgGACncPtSerQnIARickettsia spotted fever group IgGArbitrary ConcentrationPoint in time (spot)SerumImmunoassay

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.