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 20346-3: Right atrial Diastolic filling period by US

Name: LOINC Code 20346-3: Right atrial Diastolic filling period by US
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:28.846Z

20346-3 is a LOINC code used to identify Right atrial Diastolic filling period by US 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 Filling period.diastole. It is commonly used with the system or sample type Heart.atrium.right.

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 Filling period.diastole. It is commonly used with the system or sample type Heart.atrium.right.

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.measured

What it does not mean

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

Key facts

Right atrial Diastolic filling period by US
Filling period.diastole
Atrial; CARD.US; Cardiac; Cardio; Cardiology; DFP; Dias; Dias fill period; Diast; Diastoli; Echography; Heart Disease; Hrt; Point in time; QNT; Quan; Quant; Quantitative; R; RA; Random; RT; Sonogram; Sonograph; Sonography; ULS; Ultrasound; US+Meas

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

Right atrial Diastolic filling period by USRA Dias fill period US.measFilling period.diastoleCARD.USTimePtHeart.atrium.right

Frequently asked questions

Code details

Code20346-3

SystemLOINC

Display nameRight atrial Diastolic filling period by US

DescriptionFilling period.diastole

Short nameRA Dias fill period US.meas

ComponentFilling period.diastole

PropertyTime

TimingPt

System (specimen)Heart.atrium.right

ScaleQn

MethodUS.measured

ClassCARD.US

Example unitsms

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0m

Last changed2.48

Part names

Filling period.diastoleTimePtHeart.atrium.rightQnUS.measuredDiastolic filling periodTime (e.g. seconds)Point in time (spot)Heart.atrium RightUltrasound.measured

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.