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 43573-5: B. burgdorferi IgM IB Qn (CSF)

Name: LOINC Code 43573-5: B. burgdorferi IgM IB Qn (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

43573-5 is a LOINC code used to identify B. burgdorferi IgM IB Qn (CSF) 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 Ab.IgM. It is commonly used with the system or sample type CSF.

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 Borrelia burgdorferi Ab.IgM. It is commonly used with the system or sample type CSF.

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: IB

What it does not mean

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

Key facts

Borrelia burgdorferi IgM Ab [Units/volume] in Cerebral spinal fluid by Immunoblot
Borrelia burgdorferi Ab.IgM
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; B burg; B burgdor; B burgdorferi; Bb; Blt; Burgdorf; Cerebral spinal fluid; Cerebrospinal Fl; ID; IMMUNE BLOT; Immune globulin M; Immunobl; Immunoblot; Immunoglobulin M; Infectious Disease; InfectiousDisease; Lyme; Lyme disease; Lymes; Microbiology; Neuro; Neurology; Point in time; QNT; Quan; Quant; Quantitative; Random; RIBA; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for B. burgdorferi IgM IB Qn (CSF) (43573-5)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

B. burgdorferi IgM IB Qn (CSF)Borrelia burgdorferi IgM Ab [Units/volume] in Cerebral spinal fluid by ImmunoblotB burgdor IgM CSF IB-aCncBorrelia burgdorferi Ab.IgMMICROBorrelia burgdorferi IgM antibody, Spinal fluidACnc

Frequently asked questions

Code details

Code43573-5

SystemLOINC

Display nameB. burgdorferi IgM IB Qn (CSF)

DescriptionBorrelia burgdorferi Ab.IgM

Short nameB burgdor IgM CSF IB-aCnc

ComponentBorrelia burgdorferi Ab.IgM

PropertyACnc

TimingPt

System (specimen)CSF

ScaleQn

MethodIB

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.69

Consumer names

Borrelia burgdorferi IgM antibody, Spinal fluid

Part names

Borrelia burgdorferi Ab.IgMACncPtCSFQnIBBorrelia burgdorferi IgMArbitrary ConcentrationPoint in time (spot)Cerebral spinal fluidImmunoblot

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.