What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 80231-4: Orifice area Mitral valve Cardiac catheterization

Name: LOINC Code 80231-4: Orifice area Mitral valve Cardiac catheterization
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:01.839Z

80231-4 is a LOINC code used to identify Orifice area Mitral valve Cardiac catheterization 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 Mitral 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 Mitral 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: Cardiac catheterization

What it does not mean

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

Key facts

Orifice area Mitral valve Cardiac catheterization
Orifice area
CARD.PROC; Cardio; Cardiology; Heart Disease; MV; MVA; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Orifice area Mitral valve Cardiac catheterizationOrifice area MV Cardiac CathOrifice areaCARD.PROCAreaPtMitral valve

Frequently asked questions

Code details

Code80231-4

SystemLOINC

Display nameOrifice area Mitral valve Cardiac catheterization

DescriptionOrifice area

Short nameOrifice area MV Cardiac Cath

ComponentOrifice area

PropertyArea

TimingPt

System (specimen)Mitral valve

ScaleQn

MethodCardiac catheterization

ClassCARD.PROC

Example unitscm2

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.67

Part names

Orifice areaAreaPtMitral valveQnCardiac catheterizationPoint 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.