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 50042-1: Basal metabolic rate index Qn

Name: LOINC Code 50042-1: Basal metabolic rate index Qn
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:34.495Z

50042-1 is a LOINC code used to identify Basal metabolic rate index Qn 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 Basal metabolic rate index. 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 Basal metabolic rate index. 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

What it does not mean

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

Key facts

Basal metabolic rate index
Arbitrary concentration; Basal Metabolic Rate; BMR; BMR index; EE; Energy expenditure; MISC; Point in time; QNT; Quan; Quant; Quantitative; Random; RMR

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

Basal metabolic rate index QnBasal metabolic rate indexBMR index Patient-aCncMISCACncPt^Patient

Frequently asked questions

Code details

Code50042-1

SystemLOINC

Display nameBasal metabolic rate index Qn

DescriptionBasal metabolic rate index

Short nameBMR index Patient-aCnc

ComponentBasal metabolic rate index

PropertyACnc

TimingPt

System (specimen)^Patient

ScaleQn

ClassMISC

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.73

Consumer names

Basal metabolic rate index

Part names

Basal metabolic rate indexACncPt^PatientQnArbitrary ConcentrationPoint 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.