LOINCActiveBoth

LOINC Code 74825-1: SLEV Ab HAI Ql (S)

74825-1 is a LOINC code used to identify SLEV Ab HAI 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 Saint Louis encephalitis virus Ab. 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 Saint Louis encephalitis 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: ACTIVE
  • Order vs observation: Both
  • Method: HAI

What it does not mean

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

Key facts

  • Saint Louis encephalitis virus Ab [Presence] in Serum by Hemagglutination inhibition
  • Saint Louis encephalitis virus Ab
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Enc; Enceph; Encephalomyelitis; Hemagglutination inhibition; HI; ID; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serum; SLE virus; SLEV; SR; St Louis

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

SLEV Ab HAI Ql (S)Saint Louis encephalitis virus Ab [Presence] in Serum by Hemagglutination inhibitionSLEV Ab Ser Ql HAISaint Louis encephalitis virus AbMICROSLEV antibody, BloodPrThr

Frequently asked questions

Code details

Code74825-1
SystemLOINC
Display nameSLEV Ab HAI Ql (S)
DescriptionSaint Louis encephalitis virus Ab
Short nameSLEV Ab Ser Ql HAI
ComponentSaint Louis encephalitis virus Ab
PropertyPrThr
TimingPt
System (specimen)Ser
ScaleOrd
MethodHAI
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.48
Last changed2.56

Consumer names

SLEV antibody, Blood

Part names

Saint Louis encephalitis virus AbPrThrPtSerOrdHAIPresence or ThresholdPoint in time (spot)SerumHemagglutination inhibition

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 74825-1 | HealthAssure