LOINCBoth

LOINC Code 6590-4: Yellow fever virus Ab LA (S) [Titer]

6590-4 is a LOINC code used to identify Yellow fever virus Ab LA (S) [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. It is commonly used with the system or sample type Ser.

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. It is commonly used with the system or sample type Ser.

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: DISCOURAGED
  • Order vs observation: Both
  • Method: LA

What it does not mean

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

Key facts

  • Yellow fever virus Ab [Titer] in Serum by Latex agglutination
  • Yellow fever virus Ab
  • ABS; Aby; American plague; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Dilution factor; Dilution Factor (Titer); ID; Infectious Disease; InfectiousDisease; LAT; Latex agglutination; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; Titer; Titered; Titre; Ttr; 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 Ab LA (S) [Titer]Yellow fever virus Ab [Titer] in Serum by Latex agglutinationYFV Ab Titr Ser LAYellow fever virus AbMICROYellow Fever virus antibody, BloodTitr

Frequently asked questions

Code details

Code6590-4
SystemLOINC
Display nameYellow fever virus Ab LA (S) [Titer]
DescriptionYellow fever virus Ab
Short nameYFV Ab Titr Ser LA
ComponentYellow fever virus Ab
PropertyTitr
TimingPt
System (specimen)Ser
ScaleQn
MethodLA
ClassMICRO
Example unitstiter
StatusDISCOURAGED
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0g
Last changed2.70

Consumer names

Yellow Fever virus antibody, Blood

Part names

Yellow fever virus AbTitrPtSerQnLATiterPoint in time (spot)SerumLatex agglutination

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.