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 20365-3: Region of interest Volume/Volume 2 by US.calculated

Name: LOINC Code 20365-3: Region of interest Volume/Volume 2 by US.calculated
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:28.847Z

20365-3 is a LOINC code used to identify Region of interest Volume/Volume 2 by US.calculated 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 Volume.XXX/Volume 2.XXX. It is commonly used with the system or sample type Region of interest.XXX.

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 Volume.XXX/Volume 2.XXX. It is commonly used with the system or sample type Region of interest.XXX.

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.calculated

What it does not mean

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

Key facts

Region of interest Volume/Volume 2 by US.calculated
Volume.XXX/Volume 2.XXX
Calc; Calculation; CARD.US; Cardio; Cardiology; Echography; Heart Disease; II; Misc; Miscellaneous; Other; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; ROI; Sonogram; Sonograph; Sonography; Spec; To be specified in another part of the message; ULS; Ultrasound; Unspecified; US Calc; US+Calc; Vol; Vol 2; Volfr; Volume fraction

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

Region of interest Volume/Volume 2 by US.calculatedROI Vol/Vol 2 VFr US CalcVolume.XXX/Volume 2.XXXCARD.USVFrPtRegion of interest.XXX

Frequently asked questions

Code details

Code20365-3

SystemLOINC

Display nameRegion of interest Volume/Volume 2 by US.calculated

DescriptionVolume.XXX/Volume 2.XXX

Short nameROI Vol/Vol 2 VFr US Calc

ComponentVolume.XXX/Volume 2.XXX

PropertyVFr

TimingPt

System (specimen)Region of interest.XXX

ScaleQn

MethodUS.calculated

ClassCARD.US

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0m

Last changed2.34

Part names

Volume.XXX/Volume 2.XXXVFrPtRegion of interest.XXXQnUS.calculatedVolume FractionPoint in time (spot)Region of interest XXXUltrasound.calculated

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.