LOINCActiveObservation

LOINC Code 18090-1: Aortic valve Orifice area by US.continuity

18090-1 is a LOINC code used to identify Aortic valve Orifice area by US.continuity 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 Orifice area. It is commonly used with the system or sample type Aortic valve.

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 Orifice area. It is commonly used with the system or sample type Aortic valve.

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: Observation
  • Method: US.continuity

What it does not mean

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

Key facts

  • Aortic valve Orifice area by US.continuity
  • Orifice area
  • AO; AoV; AV; AVA; CARD.US; Cardio; Cardiology; Cont; Echography; Heart Disease; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound

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

Aortic valve Orifice area by US.continuityAV Orifice area US.contOrifice areaCARD.USAreaPtAortic valve

Frequently asked questions

Code details

Code18090-1
SystemLOINC
Display nameAortic valve Orifice area by US.continuity
DescriptionOrifice area
Short nameAV Orifice area US.cont
ComponentOrifice area
PropertyArea
TimingPt
System (specimen)Aortic valve
ScaleQn
MethodUS.continuity
ClassCARD.US
Example unitscm2
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.67

Part names

Orifice areaAreaPtAortic valveQnUS.continuityPoint in time (spot)Ultrasound.continuity

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 18090-1 | HealthAssure