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LOINC Code 56621-6: Coxsackievirus A9 IgG IF (CSF) [Titer]

56621-6 is a LOINC code used to identify Coxsackievirus A9 IgG IF (CSF) [Titer] 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 Coxsackievirus A9 Ab.IgG. 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 Coxsackievirus A9 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

  • Coxsackievirus A9 IgG Ab [Titer] in Cerebral spinal fluid by Immunofluorescence
  • Coxsackievirus A9 Ab.IgG
  • ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; CAV; Cerebral spinal fluid; Cerebrospinal Fl; Coxsackie; Coxsackie virus; CV; CV A9; Dilution factor; Dilution Factor (Titer); FA; Fluorescent antibody; Fluoresent; ID; IFA; Immune fluorescence; Immune globulin G; Immunoflour; Immunofluor; Immunofluorescence; Immunoglobulin G; Infectious Disease; InfectiousDisease; Microbiology; Neuro; Neurology; Point in time; Random; SmQn; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Time Resolved Fluorescence; Titer; Titered; Titre; TRF; Ttr

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

Coxsackievirus A9 IgG IF (CSF) [Titer]Coxsackievirus A9 IgG Ab [Titer] in Cerebral spinal fluid by ImmunofluorescenceCV A9 IgG Titr CSF IFCoxsackievirus A9 Ab.IgGMICROCoxsackievirus A9 IgG antibody, Spinal fluidTitr

Frequently asked questions

Code details

Code56621-6
SystemLOINC
Display nameCoxsackievirus A9 IgG IF (CSF) [Titer]
DescriptionCoxsackievirus A9 Ab.IgG
Short nameCV A9 IgG Titr CSF IF
ComponentCoxsackievirus A9 Ab.IgG
PropertyTitr
TimingPt
System (specimen)CSF
ScaleSemiQn
MethodIF
ClassMICRO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.29
Last changed2.75

Consumer names

Coxsackievirus A9 IgG antibody, Spinal fluid

Part names

Coxsackievirus A9 Ab.IgGTitrPtCSFSemiQnIFCoxsackievirus A9 IgGTiterPoint 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.

LOINC Code 56621-6 | HealthAssure