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 13231-6: SLEV IgM Qn (CSF)

Name: LOINC Code 13231-6: SLEV IgM Qn (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

13231-6 is a LOINC code used to identify SLEV IgM 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 Saint Louis encephalitis virus Ab.IgM. 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 Saint Louis encephalitis virus Ab.IgM. 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

Saint Louis encephalitis virus IgM Ab [Units/volume] in Cerebral spinal fluid
Saint Louis encephalitis virus Ab.IgM
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; Enc; Enceph; Encephalomyelitis; ID; Immune globulin M; Immunoglobulin M; Infectious Disease; InfectiousDisease; Microbiology; Neuro; Neurology; Point in time; QNT; Quan; Quant; Quantitative; Random; SLE virus; SLEV; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; St Louis

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 SLEV IgM Qn (CSF) (13231-6)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

SLEV IgM Qn (CSF)Saint Louis encephalitis virus IgM Ab [Units/volume] in Cerebral spinal fluidSLEV IgM CSF-aCncSaint Louis encephalitis virus Ab.IgMMICROSLEV IgM antibody, Spinal fluidACnc

Frequently asked questions

Code details

Code13231-6

SystemLOINC

Display nameSLEV IgM Qn (CSF)

DescriptionSaint Louis encephalitis virus Ab.IgM

Short nameSLEV IgM CSF-aCnc

ComponentSaint Louis encephalitis virus Ab.IgM

PropertyACnc

TimingPt

System (specimen)CSF

ScaleQn

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0j-a

Last changed2.69

Consumer names

SLEV IgM antibody, Spinal fluid

Part names

Saint Louis encephalitis virus Ab.IgMACncPtCSFQnSaint Louis encephalitis virus IgMArbitrary 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.