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 31484-9: Leptospira sp IgG Qn (CSF)

Name: LOINC Code 31484-9: Leptospira sp IgG Qn (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

31484-9 is a LOINC code used to identify Leptospira sp IgG Qn (CSF) 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 Leptospira sp Ab.IgG. It is commonly used with the system or sample type CSF.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Leptospira sp Ab.IgG. It is commonly used with the system or sample type CSF.

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

What it does not mean

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

Key facts

Leptospira sp IgG Ab [Units/volume] in Cerebral spinal fluid
Leptospira sp Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; Leptospirosis; Microbiology; Neuro; Neurology; Point in time; QNT; Quan; Quant; Quantitative; Random; species; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; spp

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Leptospira sp IgG Qn (CSF) (31484-9)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Leptospira sp IgG Qn (CSF)Leptospira sp IgG Ab [Units/volume] in Cerebral spinal fluidLeptospira IgG CSF-aCncLeptospira sp Ab.IgGMICROLeptospira sp IgG antibody, Spinal fluidACnc

Frequently asked questions

Code details

Code31484-9

SystemLOINC

Display nameLeptospira sp IgG Qn (CSF)

DescriptionLeptospira sp Ab.IgG

Short nameLeptospira IgG CSF-aCnc

ComponentLeptospira sp Ab.IgG

PropertyACnc

TimingPt

System (specimen)CSF

ScaleQn

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.07

Last changed2.69

Consumer names

Leptospira sp IgG antibody, Spinal fluid

Part names

Leptospira sp Ab.IgGACncPtCSFQnLeptospira sp IgGArbitrary ConcentrationPoint in time (spot)Cerebral spinal fluid

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.