LOINCActiveBoth

LOINC Code 47304-1: B. burgdorferi IgG index Qn (S+CSF)

47304-1 is a LOINC code used to identify B. burgdorferi IgG index Qn (S+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.IgG index. It is commonly used with the system or sample type Ser+CSF.

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 Ab.IgG index. It is commonly used with the system or sample type Ser+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

What it does not mean

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

Key facts

  • Borrelia burgdorferi IgG Ab index [Units/volume] in Serum and CSF
  • Borrelia burgdorferi Ab.IgG index
  • ABS; Aby; AI; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; B burg; B burgdor; B burgdorferi; Bb; Both serum and cerebrospinal fluid; Burgdorf; Cerebral spinal fluid; Cerebrospinal Fl; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; Lyme; Lyme disease; Lymes; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; 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 IgG index Qn (S+CSF)Borrelia burgdorferi IgG Ab index [Units/volume] in Serum and CSFB burgdor IgG Index Ser+CSF-aCncBorrelia burgdorferi Ab.IgG indexMICROBorrelia burgdorferi IgG index, Serum+Cerebrospinal fluidACnc

Frequently asked questions

Code details

Code47304-1
SystemLOINC
Display nameB. burgdorferi IgG index Qn (S+CSF)
DescriptionBorrelia burgdorferi Ab.IgG index
Short nameB burgdor IgG Index Ser+CSF-aCnc
ComponentBorrelia burgdorferi Ab.IgG index
PropertyACnc
TimingPt
System (specimen)Ser+CSF
ScaleQn
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.19
Last changed2.73

Consumer names

Borrelia burgdorferi IgG index, Serum+Cerebrospinal fluid

Part names

Borrelia burgdorferi Ab.IgG indexACncPtSer+CSFQnBorrelia burgdorferi IgG indexArbitrary ConcentrationPoint in time (spot)Serum and CSF

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.