LOINCActiveOrder

LOINC Code 72171-2: Glucose tolerance 2 hours panel

72171-2 is a LOINC code used to identify Glucose tolerance 2 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 2H 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 2H 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 2 hours panel - Serum or Plasma
  • Glucose tolerance 2H panel
  • Used to order a 2 hour glucose tolerance when the dose is unknown. Glucose tolerance testing is commonly ordered test to check for diabetes, insulin resistance, and less commonly for reactive hypoglycemia or disorders of carbohydrate metabolism.
  • 120 min; 120 minutes; 120min; 2 hours; CHEMISTRY.CHALLENGE TESTING; Glu; Glu tol; Gluc; Glucose tolerance; Glucoseur; GTT; GTT 2h 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 2 hours panelGlucose tolerance 2 hours panel - Serum or PlasmaGTT 2h Pnl SerPlGlucose tolerance 2H panelPANEL.CHALGlucose tolerance 2 hours panel, Blood-

Frequently asked questions

Code details

Code72171-2
SystemLOINC
Display nameGlucose tolerance 2 hours panel
DescriptionGlucose tolerance 2H panel
Short nameGTT 2h Pnl SerPl
ComponentGlucose tolerance 2H panel
Property-
Timing-
System (specimen)Ser/Plas
ScaleQn
ClassPANEL.CHAL
StatusACTIVE
Order/ObservationOrder

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.42
Last changed2.73

Consumer names

Glucose tolerance 2 hours panel, Blood

Part names

Glucose tolerance 2H panel-Ser/PlasQnGlucose tolerance 2 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.

LOINC Code 72171-2 | HealthAssure