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St. Michael's Hospital Laboratory
Test Directory



Order Name REF
Athena Orderable:
None Available - Order as a Miscellaneous Test
Revision Date 07/10/2020
Test Name Methodology LOINC Code
Quantitative Chemiluminescent Immunoassay 21365-2 
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred See Instructions Frozen
Instructions RML test code: 5518675
Click here to view information on the RML website.

Patient should fast overnight prior to collection.

Testing Schedule M,Th at Reference facility 
Expected TAT 2-6 days  
Clinical Use 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. 
Rejection Criteria Specimens from a non-fasting patient are unacceptable, as are specimens that are icteric or severely hemolyzed. 
CPT Code(s) 83520
Lab Section Reference Lab