LOINCActiveBoth

LOINC Code 42965-4: SLEV IgM Ql (S)

42965-4 is a LOINC code used to identify SLEV IgM Ql (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 Saint Louis encephalitis virus Ab.IgM. It is commonly used with the system or sample type Ser.

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 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

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 Serum
  • Saint Louis encephalitis virus Ab.IgM
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Enc; Enceph; Encephalomyelitis; ID; Immune globulin M; Immunoglobulin M; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serum; SLE virus; SLEV; SR; 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.

Common synonyms

SLEV IgM Ql (S)Saint Louis encephalitis virus IgM Ab [Presence] in SerumSLEV IgM Ser QlSaint Louis encephalitis virus Ab.IgMMICROSLEV IgM antibody, BloodPrThr

Frequently asked questions

Code details

Code42965-4
SystemLOINC
Display nameSLEV IgM Ql (S)
DescriptionSaint Louis encephalitis virus Ab.IgM
Short nameSLEV IgM Ser Ql
ComponentSaint Louis encephalitis virus Ab.IgM
PropertyPrThr
TimingPt
System (specimen)Ser
ScaleOrd
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.16
Last changed2.56

Consumer names

SLEV IgM antibody, Blood

Part names

Saint Louis encephalitis virus Ab.IgMPrThrPtSerOrdSaint Louis encephalitis virus IgMPresence or ThresholdPoint in time (spot)Serum

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.

LOINC Code 42965-4 | HealthAssure