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 20255-6: Mean pressure gradient by US+Calculated

Name: LOINC Code 20255-6: Mean pressure gradient by US+Calculated
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:28.846Z

20255-6 is a LOINC code used to identify Mean pressure gradient 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 Pressure gradient.mean. It is commonly used with the system or sample type Circulatory system.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 Pressure gradient.mean. It is commonly used with the system or sample type Circulatory system.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

Mean pressure gradient by US+Calculated
Pressure gradient.mean
Average; Avg; Calc; Calculation; CARD.US; Cardio; Cardiology; Circ; Circ sys; Echography; Grad; Heart Disease; Mean press grad; Misc; Miscellaneous; Other; Point in time; Press grad; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; Spec; To be specified in another part of the message; ULS; Ultrasound; Unspecified; US Calc

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

Mean pressure gradient by US+CalculatedMean press grad US+CalcPressure gradient.meanCARD.USPressDiffPtCirculatory system.XXX

Frequently asked questions

Code details

Code20255-6

SystemLOINC

Display nameMean pressure gradient by US+Calculated

DescriptionPressure gradient.mean

Short nameMean press grad US+Calc

ComponentPressure gradient.mean

PropertyPressDiff

TimingPt

System (specimen)Circulatory system.XXX

ScaleQn

MethodUS+Calculated

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.meanPressDiffPtCirculatory system.XXXQnUS+CalculatedMean pressure gradientPressure DifferencePoint in time (spot)Circulatory system XXX

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.