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 72651-3: Glucose in serum - glucose in pleural fluid (S/P+Pleur fld) [Molar conc diff]

Name: LOINC Code 72651-3: Glucose in serum - glucose in pleural fluid (S/P+Pleur fld) [Molar conc diff]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:51.525Z

72651-3 is a LOINC code used to identify Glucose in serum - glucose in pleural fluid (S/P+Pleur fld) [Molar conc diff] 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 Glucose.serum-glucose.plr fld. It is commonly used with the system or sample type Ser/Plas+Plr fld.

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 Glucose.serum-glucose.plr fld. It is commonly used with the system or sample type Ser/Plas+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: Both

What it does not mean

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

Key facts

Glucose in serum - glucose in pleural fluid [Molar concentration difference]
Glucose.serum-glucose.plr fld
Chemistry; Glu; Gluc; glucose gradient; Glucose ser - plr fld; Glucoseur; Pl; Plasma; Pleural; Pleural fluid; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SCDiff; Ser; SerP; SerPl; SerPl+Plr; SerPlas; Serum; Serum or plasma; SR; thoracentesis fluid

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

Glucose in serum - glucose in pleural fluid (S/P+Pleur fld) [Molar conc diff]Glucose in serum - glucose in pleural fluid [Molar concentration difference]Glucose ser - plr fld-SCDiffGlucose.serum-glucose.plr fldCHEMGlucose in serum - glucose in pleural fluid, S/P+Pleur FldSCncDiff

Frequently asked questions

Code details

Code72651-3

SystemLOINC

Display nameGlucose in serum - glucose in pleural fluid (S/P+Pleur fld) [Molar conc diff]

DescriptionGlucose.serum-glucose.plr fld

Short nameGlucose ser - plr fld-SCDiff

ComponentGlucose.serum-glucose.plr fld

PropertySCncDiff

TimingPt

System (specimen)Ser/Plas+Plr fld

ScaleQn

ClassCHEM

Example unitsmmol/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.42

Last changed2.50

Consumer names

Glucose in serum - glucose in pleural fluid, S/P+Pleur Fld

Part names

Glucose.serum-glucose.plr fldSCncDiffPtSer/Plas+Plr fldQnGlucose in serum - glucose in pleural fluidSubstance concentration differencePoint in time (spot)Serum or Plasma and 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.