LOINCActiveBoth

LOINC Code 29829-9: La Crosse virus IgM Ql (Specimen)

29829-9 is a LOINC code used to identify La Crosse virus IgM Ql (Specimen) 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 La Crosse virus Ab.IgM. It is commonly used with the system or sample type XXX.

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 La Crosse virus Ab.IgM. It is commonly used with the system or sample type XXX.

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

  • La Crosse virus IgM Ab [Presence] in Specimen
  • La Crosse virus Ab.IgM
  • California encephalitis virus has more than 20 strains, most of which include "strain" in the name. In some cases such as La Crosse virus, however, the name does not signal that it is a strain of California encephalitis.
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; California Encephalitis Virus; ID; Immune globulin M; Immunoglobulin M; Infectious Disease; InfectiousDisease; Lacrosse virus; LACV; Microbiology; Misc; Miscellaneous; Ordinal; Other; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Spec; To be specified in another part of the message; Unspecified

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

La Crosse virus IgM Ql (Specimen)La Crosse virus IgM Ab [Presence] in SpecimenLACV IgM Spec QlLa Crosse virus Ab.IgMMICROLa Crosse virus IgM antibody, SpecimenPrThr

Frequently asked questions

Code details

Code29829-9
SystemLOINC
Display nameLa Crosse virus IgM Ql (Specimen)
DescriptionLa Crosse virus Ab.IgM
Short nameLACV IgM Spec Ql
ComponentLa Crosse virus Ab.IgM
PropertyPrThr
TimingPt
System (specimen)XXX
ScaleOrd
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.04
Last changed2.69

Consumer names

La Crosse virus IgM antibody, Specimen

Part names

LA Crosse virus Ab.IgMPrThrPtXXXOrdLa Crosse virus IgMPresence or ThresholdPoint in time (spot)

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 29829-9 | HealthAssure