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LOINC Code 59237-8: Free PSA/Total PSA (Pleur fld) [Mass fraction]

59237-8 is a LOINC code used to identify Free PSA/Total PSA (Pleur fld) [Mass fraction] 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/Prostate specific Ag.total. It is commonly used with the system or sample type Plr 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/Prostate specific Ag.total. It is commonly used with the system or sample type Plr 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: Observation

What it does not mean

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

Key facts

  • Prostate Specific Ag Free/Prostate specific Ag.total in Pleural fluid
  • Prostate specific Ag.free/Prostate specific Ag.total
  • Chemistry; fPSA; FR; Kallikrein 3; Mass fraction; Non-protein bound; P-30 antigen; Percent; Pleural; Pleural fluid; Point in time; PS; PSA; PSA Free; QNT; Quan; Quant; Quantitative; Random; Seminin; Spec; thoracentesis fluid; Tot; Totl; 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.

Common synonyms

Free PSA/Total PSA (Pleur fld) [Mass fraction]Prostate Specific Ag Free/Prostate specific Ag.total in Pleural fluidPSA Free MFr PlrProstate specific Ag.free/Prostate specific Ag.totalCHEMFree PSA/Total Prostate Specific Antigen (Total PSA), Pleural fluidMFr

Frequently asked questions

Code details

Code59237-8
SystemLOINC
Display nameFree PSA/Total PSA (Pleur fld) [Mass fraction]
DescriptionProstate specific Ag.free/Prostate specific Ag.total
Short namePSA Free MFr Plr
ComponentProstate specific Ag.free/Prostate specific Ag.total
PropertyMFr
TimingPt
System (specimen)Plr fld
ScaleQn
ClassCHEM
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.32
Last changed2.40

Consumer names

Free PSA/Total Prostate Specific Antigen (Total PSA), Pleural fluid

Part names

Prostate specific Ag.free/Prostate specific Ag.totalMFrPtPlr fldQnMass fractionPoint in time (spot)Pleural 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.