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LOINC Code 71783-5: Yellow fever virus neut ab Neut test (CSF) [Titer]

71783-5 is a LOINC code used to identify Yellow fever virus neut ab Neut test (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 Yellow fever virus Ab.Neut. 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 Yellow fever virus Ab.Neut. 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: Neut

What it does not mean

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

Key facts

  • Yellow fever virus neutralizing antibody [Titer] in Cerebral spinal fluid by Neutralization test
  • Yellow fever virus Ab.Neut
  • Vaccination associated encephalitis is possible. CNS infection due to wild Yellow Fever virus would be rare.
  • ABS; Aby; American plague; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; Conventional virus neutralization test; cVNT; Dilution factor; Dilution Factor (Titer); ID; Infectious Disease; InfectiousDisease; Microbiology; NAb; Neuro; Neurology; NEUTRALIZATION; Neutralization test; NT; Point in time; Random; Serum virus neutralization; SmQn; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; SVN; Titer; Titered; Titre; Ttr; Virus neutralization test; VNT; yellow jack; YFV

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

Yellow fever virus neut ab Neut test (CSF) [Titer]Yellow fever virus neutralizing antibody [Titer] in Cerebral spinal fluid by Neutralization testYFV NAb Titr CSF NtYellow fever virus Ab.NeutMICROYellow Fever virus neutralizing antibody, Spinal fluidTitr

Frequently asked questions

Code details

Code71783-5
SystemLOINC
Display nameYellow fever virus neut ab Neut test (CSF) [Titer]
DescriptionYellow fever virus Ab.Neut
Short nameYFV NAb Titr CSF Nt
ComponentYellow fever virus Ab.Neut
PropertyTitr
TimingPt
System (specimen)CSF
ScaleSemiQn
MethodNeut
ClassMICRO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.40
Last changed2.75

Consumer names

Yellow Fever virus neutralizing antibody, Spinal fluid

Part names

Yellow fever virus Ab.NeutTitrPtCSFSemiQnNeutTiterPoint in time (spot)Cerebral spinal fluidNeutralization test

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.