What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 82986-1: Contactin-associated protein 2 IgG IF Ql (CSF)

Name: LOINC Code 82986-1: Contactin-associated protein 2 IgG IF Ql (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:10.305Z

82986-1 is a LOINC code used to identify Contactin-associated protein 2 IgG IF 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 Contactin-associated protein 2 Ab.IgG. 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 Contactin-associated protein 2 Ab.IgG. 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: IF

What it does not mean

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

Key facts

Contactin-associated protein 2 IgG Ab [Presence] in Cerebral spinal fluid by Immunofluorescence
Contactin-associated protein 2 Ab.IgG
ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Assoc; Autoantibodies; Autoantibody; CASPR2; CASPR2 Ab; Cerebral spinal fluid; Cerebrospinal Fl; FA; Fluorescent antibody; Fluoresent; IFA; II; Immune fluorescence; Immune globulin G; Immunoflour; Immunofluor; Immunofluorescence; Immunoglobulin G; Neuro; Neurology; Ordinal; Point in time; PR; Prot; QL; Qual; Qualitative; Random; Screen; Serology; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Time Resolved Fluorescence; TRF

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

Contactin-associated protein 2 IgG IF Ql (CSF)Contactin-associated protein 2 IgG Ab [Presence] in Cerebral spinal fluid by ImmunofluorescenceCASPR2 IgG CSF Ql IFContactin-associated protein 2 Ab.IgGSEROContactin-associated protein 2 IgG antibody, Spinal fluidPrThr

Frequently asked questions

Code details

Code82986-1

SystemLOINC

Display nameContactin-associated protein 2 IgG IF Ql (CSF)

DescriptionContactin-associated protein 2 Ab.IgG

Short nameCASPR2 IgG CSF Ql IF

ComponentContactin-associated protein 2 Ab.IgG

PropertyPrThr

TimingPt

System (specimen)CSF

ScaleOrd

MethodIF

ClassSERO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.58

Last changed2.58

Consumer names

Contactin-associated protein 2 IgG antibody, Spinal fluid

Part names

Contactin-associated protein 2 Ab.IgGPrThrPtCSFOrdIFContactin-associated protein 2 IgGPresence or ThresholdPoint in time (spot)Cerebral spinal fluidImmunofluorescence (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.