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.

LOINCActive

LOINC Code 59090-1: Region of interest Internal dimension by US

Name: LOINC Code 59090-1: Region of interest Internal dimension by US
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:39.742Z

59090-1 is a LOINC code used to identify Region of interest Internal dimension 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 Internal Dimension. 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 Internal Dimension. 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
Method: US

What it does not mean

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

Key facts

Region of interest Internal dimension by US
Internal Dimension
The distance between opposing surfaces across a gap.
CARD.US; Cardio; Cardiology; Echography; Heart Disease; Length; Misc; Miscellaneous; Other; 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

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 Internal dimension by USROI Internal dim USInternal DimensionCARD.USLenPtRegion of interest.XXX

Frequently asked questions

Code details

Code59090-1

SystemLOINC

Display nameRegion of interest Internal dimension by US

DescriptionInternal Dimension

Short nameROI Internal dim US

ComponentInternal Dimension

PropertyLen

TimingPt

System (specimen)Region of interest.XXX

ScaleQn

MethodUS

ClassCARD.US

Example unitscm

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.32

Last changed2.48

Part names

Internal dimensionLenPtRegion of interest.XXXQnUSLengthPoint in time (spot)Region of interest XXXUltrasound

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.