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.

LOINCBoth

LOINC Code 53729-0: B. burgdorferi 49736 IgG Qn

Name: LOINC Code 53729-0: B. burgdorferi 49736 IgG Qn
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:36.581Z

53729-0 is a LOINC code used to identify B. burgdorferi 49736 IgG Qn 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 49736 Ab.IgG. It is commonly used with the system or sample type Ser/Plas.

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 49736 Ab.IgG. It is commonly used with the system or sample type Ser/Plas.

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: DEPRECATED
Order vs observation: Both

What it does not mean

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

Key facts

Deprecated Borrelia burgdorferi 49736 Ab.IgG
Borrelia burgdorferi 49736 Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; B burg; B burgdor; B burgdor 49736; B burgdorferi; Bb; Burgdorf; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; Lyme; Lyme disease; Lymes; Microbiology; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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 49736 IgG QnDeprecated Borrelia burgdorferi 49736 Ab.IgGDeprecated B burgdorferi 49736 IgGBorrelia burgdorferi 49736 Ab.IgGMICROBorrelia burgdorferi 49736 IgG antibody, BloodACnc

Frequently asked questions

Code details

Code53729-0

SystemLOINC

Display nameB. burgdorferi 49736 IgG Qn

DescriptionBorrelia burgdorferi 49736 Ab.IgG

Short nameDeprecated B burgdorferi 49736 IgG

ComponentBorrelia burgdorferi 49736 Ab.IgG

PropertyACnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassMICRO

StatusDEPRECATED

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.26

Last changed2.69

Consumer names

Borrelia burgdorferi 49736 IgG antibody, Blood

Part names

Borrelia burgdorferi 49736 Ab.IgGACncPtSer/PlasQnBorrelia burgdorferi 49736 IgGArbitrary ConcentrationPoint in time (spot)Serum or Plasma

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.