LOINCActiveBoth

LOINC Code 3141-9: Body weight Measured

3141-9 is a LOINC code used to identify Body weight Measured 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 Body weight. 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 Body weight. 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: Both
  • Method: Measured

What it does not mean

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

Key facts

  • Body weight Measured
  • Body weight
  • Bdy weight; bod; Bodies; BODY WEIGHT.ATOM; Point in time; QNT; Quan; Quant; Quantitative; Random; Wt

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

Body weight MeasuredWeight MeasuredBody weightBDYWGT.ATOMMassPt^Patient

Frequently asked questions

Code details

Code3141-9
SystemLOINC
Display nameBody weight Measured
DescriptionBody weight
Short nameWeight Measured
ComponentBody weight
PropertyMass
TimingPt
System (specimen)^Patient
ScaleQn
MethodMeasured
ClassBDYWGT.ATOM
Example unitsgm;kg;lb-oz
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.73

Part names

Body weightMassPt^PatientQnMeasuredPoint 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.

LOINC Code 3141-9 | HealthAssure