Porphyrins, Total, Plasma

Test Code

CPT Codes

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

Minimum Volume
0.4 mL

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

Light protection is required; collect blood sample with foil-wrapped tube. Separate plasma or serum specimens by centrifugation. Avoid hemolysis. Remove 2 mL plasma or serum to a light-protected tube.
Freeze immediately after separation and ship frozen samples on dry ice.

Transport Container
Transport tube - protected from light

Transport Temperature

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

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Not protected from light • Hemolysis • Serum Separator Tube (SST®)

High Performance Liquid Chromatography (HPLC)

Setup Schedule
Set up: Tues, Thurs; Report available: 4 days

Reference Range
1.0-5.6 mcg/L

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

Performing Laboratory
Quest Diagnostics Nichols Inst San Juan Capistrano
33608 Ortega Highway
San Juan Capistrano, CA 92690-6130

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.