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.

LOINCActiveOrder

LOINC Code 50588-3: Glucose tolerance 5 hours panel

Name: LOINC Code 50588-3: Glucose tolerance 5 hours panel
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:34.496Z

50588-3 is a LOINC code used to identify Glucose tolerance 5 hours panel 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 tolerance 5H panel. 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 Glucose tolerance 5H panel. 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: Order
Panel type: Panel

What it does not mean

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

Key facts

Glucose tolerance 5 hours panel - Serum or Plasma
Glucose tolerance 5H panel
Used to order a 5 hour glucose tolerance when the dose is unknown
CHEMISTRY.CHALLENGE TESTING; Endocrine; Endocrinology; Glu; Glu tol; Gluc; Glucose tolerance; Glucoseur; GTT; GTT 5h Pnl; Pan; PANEL.CHALLENGE; Panl; Pl; Plasma; Plsm; Pnl; QNT; Quan; Quant; Quantitative; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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 tolerance 5 hours panelGlucose tolerance 5 hours panel - Serum or PlasmaGTT 5h Pnl SerPlGlucose tolerance 5H panelPANEL.CHALGlucose tolerance 5 hours panel, Blood-

Frequently asked questions

Code details

Code50588-3

SystemLOINC

Display nameGlucose tolerance 5 hours panel

DescriptionGlucose tolerance 5H panel

Short nameGTT 5h Pnl SerPl

ComponentGlucose tolerance 5H panel

Property-

Timing-

System (specimen)Ser/Plas

ScaleQn

ClassPANEL.CHAL

StatusACTIVE

Order/ObservationOrder

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.73

Consumer names

Glucose tolerance 5 hours panel, Blood

Part names

Glucose tolerance 5H panel-Ser/PlasQnGlucose tolerance 5 hours panelSerum 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.