LOINCActiveBoth

LOINC Code 10646-8: Astrovirus EM Nom (Stl)

10646-8 is a LOINC code used to identify Astrovirus EM Nom (Stl) 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 Astrovirus. It is commonly used with the system or sample type Stool.

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 Astrovirus. It is commonly used with the system or sample type Stool.

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: Microscopy.electron

What it does not mean

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

Key facts

  • Astrovirus [Identifier] in Stool by Electron microscopy
  • Astrovirus
  • Astro virus; Bowel movement; EM; Faecal; Faeces; Fecal; Feces; Gastro; Gastroenterology; GI; HAstV; ID; Identity or presence; Infectious Disease; InfectiousDisease; Micro; Microbiology; Micros; Microscopic; Nominal; Point in time; Random; Stl; Stool = Fecal

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

Astrovirus EM Nom (Stl)Astrovirus [Identifier] in Stool by Electron microscopyHAstV Stl EMAstrovirusMICROAstrovirus, StoolPrid

Frequently asked questions

Code details

Code10646-8
SystemLOINC
Display nameAstrovirus EM Nom (Stl)
DescriptionAstrovirus
Short nameHAstV Stl EM
ComponentAstrovirus
PropertyPrid
TimingPt
System (specimen)Stool
ScaleNom
MethodMicroscopy.electron
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0i
Last changed2.19

Consumer names

Astrovirus, Stool

Part names

AstrovirusPridPtStoolNomMicroscopy.electronPresence or IdentityPoint in time (spot)Electron microscopy

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 10646-8 | HealthAssure