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 55421-2: Calories burned Machine estimate

Name: LOINC Code 55421-2: Calories burned Machine estimate
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:37.765Z

55421-2 is a LOINC code used to identify Calories burned Machine estimate 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 Calories burned. It is commonly used with the system or sample type ^Patient.

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 Calories burned. It is commonly used with the system or sample type ^Patient.

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: Machine estimate

What it does not mean

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

Key facts

Calories burned Machine estimate
Calories burned
CLIN; Energy/time; estimation; Point in time; Power; QNT; Quan; Quant; Quantitative; Random

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

Calories burned Machine estimateCalories burned Machine estCalories burnedCLINCalories burned, Machine EstimateEngRatPt

Frequently asked questions

Code details

Code55421-2

SystemLOINC

Display nameCalories burned Machine estimate

DescriptionCalories burned

Short nameCalories burned Machine est

ComponentCalories burned

PropertyEngRat

TimingPt

System (specimen)^Patient

ScaleQn

MethodMachine estimate

ClassCLIN

Example unitsKcal

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.27

Last changed2.70

Consumer names

Calories burned, Machine Estimate

Part names

Calories burnedEngRatPt^PatientQnMachine estimatePower (Energy/Time)Point in time (spot)

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.