Proinsulin Response to Glucose, 5 Specimens

Test Code

15853

CPT Codes
84206 (x5)

Preferred Specimen

1 mL serum (x5)

Patient Preparation
Overnight fasting is required

Minimum Volume

0.5 mL (x5)

Instructions

For each timed specimen submitted, each tube must be clearly marked with time drawn. Submit all tubes with one test request form.

Draw baseline fasting specimen. Administer 75 grams oral Glucose. Glucose is not supplied by Quest Diagnostics.

Transport Container

Plastic screw-cap vial (x5)

Transport Temperature

Frozen

Specimen Stability

Room temperature: 24 hours
Refrigerated: 72 hours
Frozen: 90 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Received room temperature

Methodology
Immunoassay (IA)

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes

Setup Schedule

Set up: Tues, Sat; Report available: 6-9 days

Reference Range

Fasting:	≤18.8	pmol/L
30 minutes post glucose:	≤32.9	pmol/L
60 minutes post glucose:	3.9-44.6	pmol/L
90 minutes post glucose:	≤44.5	pmol/L
120 minutes post glucose:	2.9-33.2	pmol/L
150 minutes post glucose:	≤31.8	pmol/L
180 minutes post glucose:	≤14.6	pmol/L
240 minutes post glucose:	≤12.3	pmol/L
300 minutes post glucose:	≤13.4	pmol/L

Clinical Significance

For diagnosis and monitoring therapy in patients with insulinomas.

Performing Laboratory

Quest Diagnostics Nichols Institute-San Juan Capistrano, CA

33608 Ortega Highway

San Juan Capistrano, CA 92675-2042

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.