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LOINC Code 21086-4: A. niger Ab Immune diff Ql (CSF)

21086-4 is a LOINC code used to identify A. niger Ab Immune diff Ql (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 Aspergillus niger Ab. It is commonly used with the system or sample type CSF.

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 Aspergillus niger Ab. 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: Both
  • Method: Immune diffusion

What it does not mean

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

Key facts

  • Aspergillus niger Ab [Presence] in Cerebral spinal fluid by Immune diffusion (ID)
  • Aspergillus niger Ab
  • A niger; ABS; Aby; Antby; Anti; Antibodies; Antibody; Asperg; Aspergil; Aspergilis; Aspergilla; Aspergillin; Aspergillosis; Aspergils; Aspergilus; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; Farmers lung; ID; Imm; Immunodiff; Immunodiffusion; Imun; Imune; Infectious Disease; InfectiousDisease; m207; Microbiology; Neuro; Neurology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; 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

A. niger Ab Immune diff Ql (CSF)Aspergillus niger Ab [Presence] in Cerebral spinal fluid by Immune diffusion (ID)A niger Ab CSF Ql IDAspergillus niger AbMICROAspergillus niger antibody, Spinal fluidPrThr

Frequently asked questions

Code details

Code21086-4
SystemLOINC
Display nameA. niger Ab Immune diff Ql (CSF)
DescriptionAspergillus niger Ab
Short nameA niger Ab CSF Ql ID
ComponentAspergillus niger Ab
PropertyPrThr
TimingPt
System (specimen)CSF
ScaleOrd
MethodImmune diffusion
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0m
Last changed2.73

Consumer names

Aspergillus niger antibody, Spinal fluid

Part names

Aspergillus niger AbPrThrPtCSFOrdImmune diffusionPresence or ThresholdPoint in time (spot)Cerebral spinal fluidImmune diffusion (ID)

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 21086-4 | HealthAssure