LOINCActiveObservation

LOINC Code 82651-1: Washout rate [Ratio] Myocardium SPECT

82651-1 is a LOINC code used to identify Washout rate [Ratio] Myocardium SPECT 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 Washout rate. It is commonly used with the system or sample type Myocardium.

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 Washout rate. It is commonly used with the system or sample type Myocardium.

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

  • Washout rate [Ratio] Myocardium SPECT
  • Washout rate
  • CARD.PROC; Cardio; Cardiology; Heart Disease; Point in time; QNT; Quan; Quant; Quantitative; Rad; Radiology; Random; Ratios; Rto

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

Washout rate [Ratio] Myocardium SPECTWashout Myocardium SPECTWashout rateCARD.PROCRatioPtMyocardium

Frequently asked questions

Code details

Code82651-1
SystemLOINC
Display nameWashout rate [Ratio] Myocardium SPECT
DescriptionWashout rate
Short nameWashout Myocardium SPECT
ComponentWashout rate
PropertyRatio
TimingPt
System (specimen)Myocardium
ScaleQn
MethodNM.SPECT
ClassCARD.PROC
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.58
Last changed2.58

Part names

Washout rateRatioPtMyocardiumQnNM.SPECTPoint in time (spot)SPECT

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.