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Test Code
LEPN
Test Name
Leptin
CPT Codes
83520
Expected Turnaround Time
5 days
Clinical Utility

Measurement of leptin levels in serum or plasma.
Specimen and Container Info

Specimen Type: Serum

Alternate Specimen Type: Plasma

Collection Container: Gold Top, Serum Separator 

Alternate Collection Container: Red Top, Plain or Lavender Top (EDTA)

Desired Specimen Volume: 0.5 mL
Collection Instructions
  1. Collect a gold top, serum separator via venipuncture.
Processing and Submission Instructions
  1. Separate serum from cells.
  2. Transfer 0.5 mL of serum to a LabCorp PP transpak frozen purple tube.
Transport Instructions

Transport to the laboratory frozen. 
Stability Requirements

Room Temperature

14 days

Refrigerated

30 days

Frozen

21 days

Freeze/Thaw Cycles

Stable x3
Causes for Rejection
  • Gross lipemia
  • Gross hemolysis
Methodology
Enzyme Immunoassay
Reference Intervals

 See patient report.
Limitations

Obesity is not generally caused by leptin deficiency, neither mutations of the leptin gene or the leptin receptor gene are frequent in humans, but leptin levels are commonly higher in subjects with obesity, and insensitivity to endogenous leptin is a hallmark of most cases of human obesity.
Reference Lab
Labcorp Of America Holdings
Testing Schedule
Monday-Friday
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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