LOINCActiveBoth

LOINC Code 18201-4: B. burgdorferi IgA IB Ql (S)

18201-4 is a LOINC code used to identify B. burgdorferi IgA 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 Ab.IgA. It is commonly used with the system or sample type Ser.

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.IgA. 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: IB

What it does not mean

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

Key facts

  • Borrelia burgdorferi IgA Ab [Presence] in Serum by Immunoblot
  • Borrelia burgdorferi Ab.IgA
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; B burg; B burgdor; B burgdorferi; Bb; Blt; Burgdorf; ID; IMMUNE BLOT; Immune globulin A; Immunobl; Immunoblot; Immunoglobulin A; 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 IgA IB Ql (S)Borrelia burgdorferi IgA Ab [Presence] in Serum by ImmunoblotB burgdor IgA Ser Ql IBBorrelia burgdorferi Ab.IgAMICROBorrelia burgdorferi IgA antibody, BloodPrThr

Frequently asked questions

Code details

Code18201-4
SystemLOINC
Display nameB. burgdorferi IgA IB Ql (S)
DescriptionBorrelia burgdorferi Ab.IgA
Short nameB burgdor IgA Ser Ql IB
ComponentBorrelia burgdorferi Ab.IgA
PropertyPrThr
TimingPt
System (specimen)Ser
ScaleOrd
MethodIB
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.58

Consumer names

Borrelia burgdorferi IgA antibody, Blood

Part names

Borrelia burgdorferi Ab.IgAPrThrPtSerOrdIBBorrelia burgdorferi IgAPresence 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 18201-4 | HealthAssure