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.

LOINCActiveBoth

LOINC Code 59239-4: Free PSA (Body fld) [Mass/Vol]

Name: LOINC Code 59239-4: Free PSA (Body fld) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

59239-4 is a LOINC code used to identify Free PSA (Body fld) [Mass/Vol] 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 Prostate specific Ag.free. It is commonly used with the system or sample type Body fld.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Prostate specific Ag.free. It is commonly used with the system or sample type Body fld.

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

What it does not mean

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

Key facts

Prostate Specific Ag Free [Mass/volume] in Body fluid
Prostate specific Ag.free
B/F; BF; bod; Bodies; Body fluid; Body fluid, unsp; Chemistry; Fl; Fld; FLU; Fluid; fPSA; FR; Kallikrein 3; Level; Mass concentration; Non-protein bound; P-30 antigen; Point in time; PS; PSA; PSA Free; QNT; Quan; Quant; Quantitative; Random; Seminin; Spec; Tumor marker

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Free PSA (Body fld) [Mass/Vol] (59239-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Free PSA (Body fld) [Mass/Vol]Prostate Specific Ag Free [Mass/volume] in Body fluidPSA Free Fld-mCncProstate specific Ag.freeCHEMFree PSA, Body fluidMCnc

Frequently asked questions

Code details

Code59239-4

SystemLOINC

Display nameFree PSA (Body fld) [Mass/Vol]

DescriptionProstate specific Ag.free

Short namePSA Free Fld-mCnc

ComponentProstate specific Ag.free

PropertyMCnc

TimingPt

System (specimen)Body fld

ScaleQn

ClassCHEM

Example unitsug/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.32

Last changed2.70

Consumer names

Free PSA, Body fluid

Part names

Prostate specific Ag.freeMCncPtBody fldQnProstate Specific Ag FreeMass ConcentrationPoint in time (spot)Body fluid

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.