C4a COMPLEMENT COMPONENT

Message
ONLY STORE AT -70 OR BELOW

Test Code
C4a Complement (19956)

Quest Code
19956

CPT Codes
86161

Preferred Specimen

1 mL frozen plasma collected in an EDTA (lavender-top) tube
Pediatric volume: 0.5 mL minimum



Minimum Volume
0.5 mL

Instructions
Centrifuge at room temperature within one half hour of collection; preferably immediately after venipuncture. Transfer the cell-free plasma to a clean tube and store immediately at -20°C, then transfer to dry ice for shipment within 6 hours or immediately freeze on dry ice or at -70°C or below.
Send frozen plasma Priority Overnight via FedEx and in a well insulated container on dry ice.

Transport Temperature
Frozen

Specimen Stability
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen -20° C: 6 hours
Frozen -70° C: 1 year

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature • Received refrigerated

Methodology
Radioimmunoassay (RIA)

FDA Status
The performance characterisitcs of this test have been validated by National Jewish Clinical Reference Laboratories. It has not been cleared or approved the the U.S. Food and Drug Administration. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
This laboratory is certified under the Clinical Laboratory Improvement Amendments of 1988 (CLIA-88) as qualified to perform high complexity clinical laboratory testing.

Setup Schedule
Thu

Report Available
23 to 23 Day(s)

Reference Range
0-2830 ng/mL

Performing Laboratory
National Jewish Health
1400 Jackson Street
Complement Lab
DENVER, CO 80206



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.