L356

Test CODE NAME

L356

Proinsulin

Methodology: Enzyme immunoassay (EIA)
Performed: Varies
Reported: Varies
Specimen Required: Patient Preparation: Baseline proinsulin levels should be collected after a 12-hour fast.
Collect: Serum Separator Tube (SST) OR Red Top Tube - 0.6 ml serum .
Specimen Preparation: Allow specimen to clot completely at room temperature. Separate serum from cells ASAP or within 2 hours of collection .
Storage/Transport Temperature: CRITICALLY FROZEN
Causes for Rejection: Nonfrozen specimen; nonserum specimen; gross hemolysis; gross lipemia
Stability: After separation from cells: Ambient/Refrigerated: Unacceptable; Frozen: 12 days.

NOTE: * This test is approved for all states. * 
Performing Laboratory 
LabCorp Laboratory Corporation of America
CPT Code(s): 84206