Porphyrins, Total, Plasma

Test Code

10290

CPT Codes
82542

Preferred Specimen

2 mL plasma collected in a sodium heparin (green-top) tube - protect from light

Minimum Volume

0.6 mL

Other Acceptable Specimens

Plasma collected in: EDTA (lavender-top) tube • Serum collected in: Red-top tube (no gel)

Instructions

Collect blood sample with foil-wrapped green-top tube. Separate plasma by centrifugation. Avoid hemolysis. Remove plasma to a light-protected tube. Freeze immediately after separation.

Transport Temperature

Frozen

Specimen Stability

Room temperature: 8 hours
Refrigerated: 8 hours
Frozen: 90 days

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

Hemolysis • Received room temperature • Received refrigerated • Not protected from light • Serum Separator Tube (SST®)

Methodology
High Performance Liquid Chromatography (HPLC)

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 FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

P.M. Sets up 2 days a week.

Report Available

Reports in 3 to 4 days.

Clinical Significance

To diagnose patients with chronic renal failure who may be suspected of primary or secondary porphyria.

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.