Test Code

CPT Codes

Preferred Specimen
1 mL serum

Minimum Volume
0.2 mL

Transport Container
Plastic screw-cap vial

Transport Temperature
Refrigerated (cold packs)

Specimen Stability
Room temperature: 8 hours
Refrigerated: 14 days
Frozen: 35 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Moderate hemolysis • Gross hemolysis • Hypericteric specimens

Electrochemiluminescence (ECL)

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: Mon, Thurs; Report available: 3 days

Reference Range
Pediatric male and female
5-9.9 Years 0.6-16.8 ng/mL
10-13.9 Years 1.4-16.5 ng/mL
14-17.9 Years 0.6-24.9 ng/mL

Adult Lean Subjects (18-71 Years) with BMI range of 18-25
Male 0.3-13.4 ng/mL
Female 4.7-23.7 ng/mL

Adult Subjects (19-60 Years) with BMI range of 25-30
Male 1.8-19.9 ng/mL
Female 8.0-38.9 ng/mL

Clinical Significance
Leptin is an adipocyte-derived hormone that is essential for normal body weight regulation. Leptin production is under neuroendocrine control so that serum concentrations vary directly with the amount of triglycerides stored in adipose tissue depots.

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.