LOINCActiveBoth

LOINC Code 23977-2: B. burgdorferi Ag IF Ql (Specimen)

23977-2 is a LOINC code used to identify B. burgdorferi Ag IF Ql (Specimen) 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 Ag. It is commonly used with the system or sample type XXX.

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 Ag. It is commonly used with the system or sample type XXX.

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: IF

What it does not mean

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

Key facts

  • Borrelia burgdorferi Ag [Presence] in Specimen by Immunofluorescence
  • Borrelia burgdorferi Ag
  • ACIF; Anticomplement Immunofluorescence; Antigen; Antigens; B burg; B burgdor; B burgdorferi; Bb; Burgdorf; DFA; FA; Fluorescent antibody; Fluoresent; ID; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Infectious Disease; InfectiousDisease; Lyme; Lyme disease; Lymes; Microbiology; Misc; Miscellaneous; Ordinal; Other; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Spec; Time Resolved Fluorescence; To be specified in another part of the message; TRF; Unspecified

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 Ag IF Ql (Specimen)Borrelia burgdorferi Ag [Presence] in Specimen by ImmunofluorescenceB burgdor Ag Spec Ql IFBorrelia burgdorferi AgMICROBorrelia burgdorferi antigen, SpecimenPrThr

Frequently asked questions

Code details

Code23977-2
SystemLOINC
Display nameB. burgdorferi Ag IF Ql (Specimen)
DescriptionBorrelia burgdorferi Ag
Short nameB burgdor Ag Spec Ql IF
ComponentBorrelia burgdorferi Ag
PropertyPrThr
TimingPt
System (specimen)XXX
ScaleOrd
MethodIF
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0o
Last changed2.69

Consumer names

Borrelia burgdorferi antigen, Specimen

Part names

Borrelia burgdorferi AgPrThrPtXXXOrdIFPresence or ThresholdPoint in time (spot)Immunofluorescence (IF)

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 23977-2 | HealthAssure