LOINCActiveBoth

LOINC Code 41991-1: SARS-CoV IgM IA Ql (S)

41991-1 is a LOINC code used to identify SARS-CoV IgM IA 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 SARS coronavirus Ab.IgM. It is commonly used with the system or sample type Ser.

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 SARS coronavirus 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
  • Method: IA

What it does not mean

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

Key facts

  • SARS coronavirus IgM Ab [Presence] in Serum by Immunoassay
  • SARS coronavirus Ab.IgM
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Corona virus; EIA; ELFA; ELISA; Enzyme immunoassay; IAA; ID; Immune globulin M; Immunoglobulin M; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; SARS Coronavirus 1; SARS-CoV; SARS-CoV-1; Screen; Serum; Severe Acute Respiratory Syndrome; SR; SUDS

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

SARS-CoV IgM IA Ql (S)SARS coronavirus IgM Ab [Presence] in Serum by ImmunoassaySARS-CoV IgM Ser Ql IASARS coronavirus Ab.IgMMICROSARS coronavirus IgM antibody, BloodPrThr

Frequently asked questions

Code details

Code41991-1
SystemLOINC
Display nameSARS-CoV IgM IA Ql (S)
DescriptionSARS coronavirus Ab.IgM
Short nameSARS-CoV IgM Ser Ql IA
ComponentSARS coronavirus Ab.IgM
PropertyPrThr
TimingPt
System (specimen)Ser
ScaleOrd
MethodIA
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.16
Last changed2.68

Consumer names

SARS coronavirus IgM antibody, Blood

Part names

SARS coronavirus Ab.IgMPrThrPtSerOrdIASARS Coronavirus IgMPresence or ThresholdPoint in time (spot)SerumImmunoassay

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 41991-1 | HealthAssure