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 49144-9: SLEV IgM Ql (Body fld)

Name: LOINC Code 49144-9: SLEV IgM Ql (Body fld)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

49144-9 is a LOINC code used to identify SLEV IgM Ql (Body fld) 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 Body fld.

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 Body fld.

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 [Presence] in Body fluid
Saint Louis encephalitis virus Ab.IgM
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; B/F; BF; bod; Bodies; Body fluid; Body fluid, unsp; Enc; Enceph; Encephalomyelitis; Fl; Fld; FLU; Fluid; ID; Immune globulin M; Immunoglobulin M; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; SLE virus; SLEV; 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 Ql (Body fld) (49144-9)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

SLEV IgM Ql (Body fld)Saint Louis encephalitis virus IgM Ab [Presence] in Body fluidSLEV IgM Fld QlSaint Louis encephalitis virus Ab.IgMMICROSLEV IgM antibody, Body fluidPrThr

Frequently asked questions

Code details

Code49144-9

SystemLOINC

Display nameSLEV IgM Ql (Body fld)

DescriptionSaint Louis encephalitis virus Ab.IgM

Short nameSLEV IgM Fld Ql

ComponentSaint Louis encephalitis virus Ab.IgM

PropertyPrThr

TimingPt

System (specimen)Body fld

ScaleOrd

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.21

Last changed2.56

Consumer names

SLEV IgM antibody, Body fluid

Part names

Saint Louis encephalitis virus Ab.IgMPrThrPtBody fldOrdSaint Louis encephalitis virus IgMPresence or ThresholdPoint in time (spot)Body 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.