LOINCActiveBoth

LOINC Code 6585-4: WEEV Ag IA Ql (S)

6585-4 is a LOINC code used to identify WEEV Ag IA Ql (S) 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 Western equine encephalitis virus Ag. It is commonly used with the system or sample type Ser.

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 Western equine encephalitis virus Ag. 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: ACTIVE
  • Order vs observation: Both
  • Method: IA

What it does not mean

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

Key facts

  • Western equine encephalitis virus Ag [Presence] in Serum by Immunoassay
  • Western equine encephalitis virus Ag
  • Antigen; Antigens; EIA; ELFA; ELISA; Enc; Enceph; Encephalomyelitis; Enzyme immunoassay; Equin; IAA; ID; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serum; SR; SUDS; Togavirus; WEE virus; WEEV; West

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

WEEV Ag IA Ql (S)Western equine encephalitis virus Ag [Presence] in Serum by ImmunoassayWEEV Ag Ser Ql IAWestern equine encephalitis virus AgMICROWEEV antigen, BloodPrThr

Frequently asked questions

Code details

Code6585-4
SystemLOINC
Display nameWEEV Ag IA Ql (S)
DescriptionWestern equine encephalitis virus Ag
Short nameWEEV Ag Ser Ql IA
ComponentWestern equine encephalitis virus Ag
PropertyPrThr
TimingPt
System (specimen)Ser
ScaleOrd
MethodIA
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0g
Last changed2.56

Consumer names

WEEV antigen, Blood

Part names

Western equine encephalitis virus AgPrThrPtSerOrdIAPresence or ThresholdPoint in time (spot)SerumImmunoassay

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 6585-4 | HealthAssure