Insulin Response to Glucose, 4 hour

Last Modified: 3/10/2021 1:58:00 PM

Medical Necessity Documentation:  
Client Notes:

Please remind patients of the time frame this testing will take, and that they need to be at the drawsite in plenty of time before closing.

On the PRMC Campus, tolerance collections are performed at Parkview Outpatient Center, 11141 Parkview Plaza Drive, Suite 100 Fort Wayne, IN 46845 Entrance 3 

Patient Preparation: Patient should discontinue taking Biotin, Vitamin B7, or Vitamin H 48 hours before getting blood drawn.
Specimen Requirements: 1.0 mL Serum in a SST Gold Top Tube (One For Each Insulin Timed Collection)
Collection Instructions: Centrifuge tubes and separate from cells within 2 hours
Transport & Storage: Temperature/Stability:

2 days Refrigerated

Reference Range: Refer to report for reference ranges
Critical Ranges:  
Test Comments: Patients taking vitamin supplements containing doses of >5 mg/day may have falsely decreased test results generated.
Methodology: Immunometric Assay
Clinical Significance:  
Custom Panel: No


Days Performed: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
Sites Performed: Parkview Regional Medical Center
PHL Test Code: ITOL4
EPIC Test Code: LAB2299
Alternate Test Names: Insulin Response to Glucose, 4 hour - No Glucose; Insulin Tolerance Test - 4 hour
Included Tests: 1 hour Insulin; 2 hour Insulin; 3 hour Insulin; 4 hour Insulin; Fasting Insulin
CPT Coding: 83525 x 5

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