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LOINC Code 18398-8: Polio virus 2 Ab CF (CSF) [Titer]

18398-8 is a LOINC code used to identify Polio virus 2 Ab CF (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 Polio virus 2 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 Polio virus 2 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: Comp fix

What it does not mean

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

Key facts

  • Polio virus 2 Ab [Titer] in Cerebral spinal fluid by Complement fixation
  • Polio virus 2 Ab
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; CF; Comp fixation; Compfix; Complement fixation; Dilution factor; Dilution Factor (Titer); ID; II; Infectious Disease; InfectiousDisease; Microbiology; Neuro; Neurology; Point in time; Polio virus type II; Poliovirus; PV; PV2; Random; SmQn; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Titer; Titered; Titre; 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

Polio virus 2 Ab CF (CSF) [Titer]Polio virus 2 Ab [Titer] in Cerebral spinal fluid by Complement fixationPV2 Ab Titr CSF CFPolio virus 2 AbMICROPolio virus 2 antibody, Spinal fluidTitr

Frequently asked questions

Code details

Code18398-8
SystemLOINC
Display namePolio virus 2 Ab CF (CSF) [Titer]
DescriptionPolio virus 2 Ab
Short namePV2 Ab Titr CSF CF
ComponentPolio virus 2 Ab
PropertyTitr
TimingPt
System (specimen)CSF
ScaleSemiQn
MethodComp fix
ClassMICRO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.75

Consumer names

Polio virus 2 antibody, Spinal fluid

Part names

Polio virus 2 AbTitrPtCSFSemiQnComp fixTiterPoint in time (spot)Cerebral spinal fluidComplement fixation

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 18398-8 | HealthAssure