LOINCActiveObservation

LOINC Code 49979-8: B. burgdorferi 35kD IgM IB Ql (S)

49979-8 is a LOINC code used to identify B. burgdorferi 35kD IgM IB 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 Borrelia burgdorferi 35kD 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 Borrelia burgdorferi 35kD 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: Observation
  • Method: IB

What it does not mean

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

Key facts

  • Borrelia burgdorferi 35kD IgM Ab [Presence] in Serum by Immunoblot
  • Borrelia burgdorferi 35kD Ab.IgM
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; B burg; B burgdor; B burgdor35kD; B burgdorferi; Bb; Blt; Burgdorf; ID; IMMUNE BLOT; Immune globulin M; Immunobl; Immunoblot; Immunoglobulin M; Infectious Disease; InfectiousDisease; Lyme; Lyme disease; Lymes; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; RIBA; Screen; Serum; SR; WB; WBLOT; West blot; West blt; Western blot

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

B. burgdorferi 35kD IgM IB Ql (S)Borrelia burgdorferi 35kD IgM Ab [Presence] in Serum by ImmunoblotB burgdor35kD IgM Ser Ql IBBorrelia burgdorferi 35kD Ab.IgMMICROBorrelia burgdorferi 35kD IgM antibody, BloodPrThr

Frequently asked questions

Code details

Code49979-8
SystemLOINC
Display nameB. burgdorferi 35kD IgM IB Ql (S)
DescriptionBorrelia burgdorferi 35kD Ab.IgM
Short nameB burgdor35kD IgM Ser Ql IB
ComponentBorrelia burgdorferi 35kD Ab.IgM
PropertyPrThr
TimingPt
System (specimen)Ser
ScaleOrd
MethodIB
ClassMICRO
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.22
Last changed2.58

Consumer names

Borrelia burgdorferi 35kD IgM antibody, Blood

Part names

Borrelia burgdorferi 35kD Ab.IgMPrThrPtSerOrdIBBorrelia burgdorferi 35kD IgMPresence or ThresholdPoint in time (spot)SerumImmunoblot

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 49979-8 | HealthAssure