LOINCActive

LOINC Code 3139-3: Body surface area Measured

3139-3 is a LOINC code used to identify Body surface area 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 surface. 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 surface. 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
  • Method: Measured

What it does not mean

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

Key facts

  • Body surface area Measured
  • Body surface
  • Bdy surface; bod; Bodies; BODY SURFACE AREA.ATOM; BSA; Point in time; QNT; Quan; Quant; Quantitative; Random; Surf

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 surface area MeasuredBSA MeasuredBody surfaceBDYSURF.ATOMAreaPt^Patient

Frequently asked questions

Code details

Code3139-3
SystemLOINC
Display nameBody surface area Measured
DescriptionBody surface
Short nameBSA Measured
ComponentBody surface
PropertyArea
TimingPt
System (specimen)^Patient
ScaleQn
MethodMeasured
ClassBDYSURF.ATOM
Example unitsm2
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Body surfaceAreaPt^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 3139-3 | HealthAssure