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LOINC Code 31826-1: Feline infectious peritonitis virus Ag Ql (Small intestine Tissue)

31826-1 is a LOINC code used to identify Feline infectious peritonitis virus Ag Ql (Small intestine Tissue) 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 Feline infectious peritonitis virus Ag. It is commonly used with the system or sample type Tsmi.

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 Feline infectious peritonitis virus Ag. It is commonly used with the system or sample type Tsmi.

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

  • Feline infectious peritonitis virus Ag [Presence] in Small intestine Tissue
  • Feline infectious peritonitis virus Ag
  • Antigen; Antigens; Coronavirus; Feline infectious peritonitis; FIP; FIPV; ID; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Tissue small intestine; 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

Feline infectious peritonitis virus Ag Ql (Small intestine Tissue)Feline infectious peritonitis virus Ag [Presence] in Small intestine TissueFIPV Ag TSMI QlFeline infectious peritonitis virus AgMICROFeline Infectious Peritonitis virus antigen, Small intestine tissuePrThr

Frequently asked questions

Code details

Code31826-1
SystemLOINC
Display nameFeline infectious peritonitis virus Ag Ql (Small intestine Tissue)
DescriptionFeline infectious peritonitis virus Ag
Short nameFIPV Ag TSMI Ql
ComponentFeline infectious peritonitis virus Ag
PropertyPrThr
TimingPt
System (specimen)Tsmi
ScaleOrd
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.07
Last changed2.56

Consumer names

Feline Infectious Peritonitis virus antigen, Small intestine tissue

Part names

Feline infectious peritonitis virus AgPrThrPtTSMIOrdPresence or ThresholdPoint in time (spot)Small intestine Tissue

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.