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 46112-9: B. burgdorferi 18kD IgG EIA Ql (S)

Name: LOINC Code 46112-9: B. burgdorferi 18kD IgG EIA Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:31.116Z

46112-9 is a LOINC code used to identify B. burgdorferi 18kD IgG EIA 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 18kD Ab.IgG. 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 18kD Ab.IgG. 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: DEPRECATED
Order vs observation: Both
Method: EIA

What it does not mean

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

Key facts

Deprecated Borrelia burgdorferi 18kD IgG Ab [Presence] in Serum by Immunoassay
Borrelia burgdorferi 18kD Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; B burg; B burgdor; B burgdor18kD; B burgdorferi; Bb; Burgdorf; ELFA; ELISA; Enzyme immunoassay; IAA; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; Lyme; Lyme disease; Lymes; MEIA; Microbiology; Ordinal; Point in time; QL; Qual; Qualitative; Random; Screen; Serum; 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

B. burgdorferi 18kD IgG EIA Ql (S)Deprecated Borrelia burgdorferi 18kD IgG Ab [Presence] in Serum by ImmunoassayDeprecated B burgdor18kD IgG Ser Ql EIABorrelia burgdorferi 18kD Ab.IgGMICROBorrelia burgdorferi 18kD IgG antibody, BloodACnc

Frequently asked questions

Code details

Code46112-9

SystemLOINC

Display nameB. burgdorferi 18kD IgG EIA Ql (S)

DescriptionBorrelia burgdorferi 18kD Ab.IgG

Short nameDeprecated B burgdor18kD IgG Ser Ql EIA

ComponentBorrelia burgdorferi 18kD Ab.IgG

PropertyACnc

TimingPt

System (specimen)Ser

ScaleOrd

MethodEIA

ClassMICRO

StatusDEPRECATED

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.36

Consumer names

Borrelia burgdorferi 18kD IgG antibody, Blood

Part names

Borrelia burgdorferi 18kD Ab.IgGACncPtSerOrdEIABorrelia burgdorferi 18kD IgGArbitrary ConcentrationPoint in time (spot)SerumImmunoassay (EIA)

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.