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 20299-4: Right ventricular Peak pressure gradient by US.doppler

Name: LOINC Code 20299-4: Right ventricular Peak pressure gradient by US.doppler
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:28.846Z

20299-4 is a LOINC code used to identify Right ventricular Peak pressure gradient by US.doppler 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 Pressure gradient.max. It is commonly used with the system or sample type Heart.ventricle.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 Pressure gradient.max. It is commonly used with the system or sample type Heart.ventricle.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.doppler

What it does not mean

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

Key facts

Right ventricular Peak pressure gradient by US.doppler
Pressure gradient.max
CARD.US; Cardiac; Cardio; Cardiology; DOP; DUPLEX; Echography; Grad; Heart Disease; Hrt; Hrt ventr; Largest; Maximal; Maximum; Peak; Peak press grad; Point in time; Press grad; QNT; Quan; Quant; Quantitative; R; Random; RT; RV; Sonogram; Sonograph; Sonography; ULS; Ultrasound; Ventricular

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 ventricular Peak pressure gradient by US.dopplerRV Peak press grad DOPPressure gradient.maxCARD.USPressDiffPtHeart.ventricle.right

Frequently asked questions

Code details

Code20299-4

SystemLOINC

Display nameRight ventricular Peak pressure gradient by US.doppler

DescriptionPressure gradient.max

Short nameRV Peak press grad DOP

ComponentPressure gradient.max

PropertyPressDiff

TimingPt

System (specimen)Heart.ventricle.right

ScaleQn

MethodUS.doppler

ClassCARD.US

Example unitsmm Hg

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0m

Last changed2.67

Part names

Pressure gradient.maxPressDiffPtHeart.ventricle.rightQnUS.dopplerGradient maximumPressure DifferencePoint in time (spot)Heart.ventricle RightUltrasound.doppler

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.