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 82638-8: Phase entropy [Score] Left ventricle SPECT --resting

Name: LOINC Code 82638-8: Phase entropy [Score] Left ventricle SPECT --resting
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:08.166Z

82638-8 is a LOINC code used to identify Phase entropy [Score] Left ventricle SPECT --resting 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 Phase entropy^resting. It is commonly used with the system or sample type Heart.ventricle.left.

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 Phase entropy^resting. It is commonly used with the system or sample type Heart.ventricle.left.

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: NM.SPECT

What it does not mean

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

Key facts

Phase entropy [Score] Left ventricle SPECT --resting
Phase entropy^resting
CARD.PROC; Cardiac; Cardio; Cardiology; Heart Disease; Hrt; Hrt ventr; L; LT; LV; Point in time; QNT; Quan; Quant; Quantitative; Rad; Radiology; Random; Scale; Scre; 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

Phase entropy [Score] Left ventricle SPECT --restingPhase entropy Resting Scre LV SPECTPhase entropy^restingCARD.PROCScorePtHeart.ventricle.left

Frequently asked questions

Code details

Code82638-8

SystemLOINC

Display namePhase entropy [Score] Left ventricle SPECT --resting

DescriptionPhase entropy^resting

Short namePhase entropy Resting Scre LV SPECT

ComponentPhase entropy^resting

PropertyScore

TimingPt

System (specimen)Heart.ventricle.left

ScaleQn

MethodNM.SPECT

ClassCARD.PROC

Example unitsscore

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.58

Last changed2.82

Part names

Phase entropy^restingScorePtHeart.ventricle.leftQnNM.SPECTPoint in time (spot)Heart ventricle - leftSPECT

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.