LOINCActiveOrder

LOINC Code 43131-2: Bacterial Ag panel (CSF)

43131-2 is a LOINC code used to identify Bacterial Ag panel (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 Bacterial Ag panel. It is commonly used with the system or sample type 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 Bacterial Ag panel. It is commonly used with the system or sample type 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: Order
  • Panel type: Panel

What it does not mean

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

Key facts

  • Bacterial Ag panel - Cerebral spinal fluid
  • Bacterial Ag panel
  • Bact; Bacterial Ag Pnl; Cerebral spinal fluid; Cerebrospinal Fl; ID; Infectious Disease; InfectiousDisease; Microbiology; Neuro; Neurology; Pan; PANEL.MICROBIOLOGY; Panl; Pnl; Point in time; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid

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

Bacterial Ag panel (CSF)Bacterial Ag panel - Cerebral spinal fluidBacterial Ag Pnl CSFBacterial Ag panelPANEL.MICROBacterial antigen panel, Spinal fluid-

Frequently asked questions

Code details

Code43131-2
SystemLOINC
Display nameBacterial Ag panel (CSF)
DescriptionBacterial Ag panel
Short nameBacterial Ag Pnl CSF
ComponentBacterial Ag panel
Property-
TimingPt
System (specimen)CSF
Scale-
ClassPANEL.MICRO
StatusACTIVE
Order/ObservationOrder

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.16
Last changed2.44

Consumer names

Bacterial antigen panel, Spinal fluid

Part names

Bacterial Ag panel-PtCSFPoint in time (spot)Cerebral spinal fluid

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 43131-2 | HealthAssure