Sign in →

Test Code 1 HR GLU TOL GLUCOSE TOLERANCE TEST, 1HR

Additional Codes

GLUCOSE TOLERANCE TEST, 1HR [LAB1816]

Collection Method

Venous collection

Minimum Volume

0.5ml

Container

Grey Top / Sodium Fluoride Potassium Oxalate

Acceptable Specimens

Serum:

  • Gold Top SST
  • Red Top


Plasma:

  • Light Geen Top (lithium heparin)
  • Grey Top(Sodium Fluoride/Potassium Oxalate)

Reference or Target Ranges

FASTING 65-99 mg/dL
1 HR 65-154 mg/dL

 

A glucose value ≥155 mg/dL suggests impaired glucose regulation; additional testing is recommended. 

Reportable Units

mg/dl

Critical Value

<50 mg/dL or >500 mg/dL

Reasons for Rejection

Hemolysis Threshold 1000 mg/dL
Icterus Threshold 60 mg/dL
Lipemia Threshold 1000 mg/dL
Other QNS, contaminated, improperly Labeled, improper specimen type

Specimen Stability

Ambient 8 hours
Refrigerated (4°C to 8°C) 72 hours
Frozen(-40°C to 0°C) N/A

Performance Information

Days and Time Performed 24/7
Expected Turn Around Time Stat: 1 hour
Routine: 4 hours
Stat Availability Yes
Performing Bench CPH Chemistry
Methodology/Method Description Roche Cobas

CPT Codes

82951

Last review/edit date

2025

Patient Preparation

Fasting