LOINCActiveBoth

LOINC Code 31743-8: Bovine diarrhea virus Ag Ql (Specimen)

31743-8 is a LOINC code used to identify Bovine diarrhea virus Ag Ql (Specimen) 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 Bovine diarrhea virus Ag. It is commonly used with the system or sample type XXX.

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 Bovine diarrhea virus Ag. It is commonly used with the system or sample type XXX.

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

What it does not mean

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

Key facts

  • Bovine diarrhea virus Ag [Presence] in Specimen
  • Bovine diarrhea virus Ag
  • Antigen; Antigens; BDV; Beef; Bovine viral diarrhea; BVD; BVDV; ID; Infectious Disease; InfectiousDisease; Microbiology; Misc; Miscellaneous; Mucosal disease; Ordinal; Other; Pestivirus; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Spec; To be specified in another part of the message; Unspecified; Vet; Veterinary

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

Bovine diarrhea virus Ag Ql (Specimen)Bovine diarrhea virus Ag [Presence] in SpecimenBVDV Ag Spec QlBovine diarrhea virus AgMICROBovine Diarrhea virus antigen, SpecimenPrThr

Frequently asked questions

Code details

Code31743-8
SystemLOINC
Display nameBovine diarrhea virus Ag Ql (Specimen)
DescriptionBovine diarrhea virus Ag
Short nameBVDV Ag Spec Ql
ComponentBovine diarrhea virus Ag
PropertyPrThr
TimingPt
System (specimen)XXX
ScaleOrd
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.07
Last changed2.69

Consumer names

Bovine Diarrhea virus antigen, Specimen

Part names

Bovine diarrhea virus AgPrThrPtXXXOrdPresence or ThresholdPoint in time (spot)

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 31743-8 | HealthAssure