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LOINC Code 63519-3: Deprecated PhenX measure - body composition

63519-3 is a LOINC code used to identify Deprecated PhenX measure - body composition 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 PhenX measure - body composition. 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 PhenX measure - body composition. 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: DEPRECATED
  • Method: PhenX

What it does not mean

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

Key facts

Deprecated PhenX measure - body composition
PhenX measure - body composition
Dual-energy X-ray absorptiometry (DXA) is one of the most widely used methods to assess body composition. A densitometer scanner device is used to scan the entire body or specific body sites such as the hip, spine, and limbs. DXA uses X-ray energy to measure body fat, muscle, and bone mineral and as a result, a small amount of radiation is delivered to the body during the DXA scan procedure. The results from a whole body DXA scan can be used to estimate total mass (gm), bone mineral content (BMC) (gm), bone area (cm2), bone mineral density, fat mass, lean mass excluding BMC (gm), lean mass including BMC (gm), and percent body fat (%). DXA scanner manufacturers produce special software that is used to analyze the DXA scan data to produce body composition results. SourceCenters for Disease Control and Prevention, National Center for Health Statistics, National Health and Nutrition Examination Survey (NHANES 2001-2002) DXA file documentation. URL: http://www.cdc.gov/nchs/data/nhanes/dxa/dxx_b.pdf (Accessed January 22, 2009). The study of body composition looks at the differences in bone, muscle, organs, and fat. Body composition analysis is an indicator of overall health as determined by a person's percentage of fat and lean mass. Body composition tests are designed to give a "whole picture" of the body. This information is useful to help develop nutrition and exercise programs to benefit the individual.
bod; Bodies; Compn; Pan; Panel; PANEL.PHENX; Panl; Pnl; Point in time; 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

Deprecated PhenX measure - body compositionPhenX measure - body compositionPANEL.PHENX-Pt^PatientPhenX

Frequently asked questions

Code details

Code63519-3
SystemLOINC
Display nameDeprecated PhenX measure - body composition
DescriptionPhenX measure - body composition
ComponentPhenX measure - body composition
Property-
TimingPt
System (specimen)^Patient
Scale-
MethodPhenX
ClassPANEL.PHENX
StatusDEPRECATED

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.36
Last changed2.46

Part names

PhenX measure - body composition-Pt^PatientPhenXPoint 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 63519-3 | HealthAssure