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 47591-3: C peptide 3 Min post dose glucose [Moles/Vol]

Name: LOINC Code 47591-3: C peptide 3 Min post dose glucose [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:32.261Z

47591-3 is a LOINC code used to identify C peptide 3 Min post dose glucose [Moles/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 C peptide^3M post dose glucose. It is commonly used with the system or sample type Ser/Plas.

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 C peptide^3M post dose glucose. It is commonly used with the system or sample type Ser/Plas.

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

C peptide [Moles/volume] in Serum or Plasma --3 minutes post dose glucose
C peptide^3M post dose glucose
3M p Glc; After; CHEMISTRY.CHALLENGE TESTING; Connecting peptide of insulin; Glu; Glu tol; Gluc; Glucose tolerance; Glucoseur; GTT; Level; p dose; p Glc; Pept; Pl; Plasma; Plsm; Point in time; Pro-insulin c peptide; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration

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

C peptide 3 Min post dose glucose [Moles/Vol]C peptide [Moles/volume] in Serum or Plasma --3 minutes post dose glucoseC peptide 3M p Glc SerPl-sCncC peptide^3M post dose glucoseCHALC peptide 3 min after glucose, BloodSCnc

Frequently asked questions

Code details

Code47591-3

SystemLOINC

Display nameC peptide 3 Min post dose glucose [Moles/Vol]

DescriptionC peptide^3M post dose glucose

Short nameC peptide 3M p Glc SerPl-sCnc

ComponentC peptide^3M post dose glucose

PropertySCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

Example unitsnmol/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.21

Last changed2.70

Consumer names

C peptide 3 min after glucose, Blood

Part names

C peptide^3M post dose glucoseSCncPtSer/PlasQnSubstance ConcentrationPoint in time (spot)Serum or Plasma

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.