Complement Component C5

For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.

Test Code

CPT Codes
84155, 84165, 86160

Preferred Specimen
1 mL serum

Minimum Volume
0.1 mL

Please note: Plasma samples are not acceptable

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 7 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Grossly lipemic • Hemolysis • Microbially contaminated

Radial Immunodiffusion (RID)

Setup Schedule
Set up: Tues, Thurs, Sat; Report available: 4-6 days

Reference Range
6.0-20.0 mg/dL

Clinical Significance
The complement system is critical to inflammatory responses. C5-C9 are components of the common pathway. Patients with congenital deficiency of any of these components are at risk of meningococcal menigitis.

Performing Laboratory
Quest Diagnostics Nichols Institute-San Juan Capistrano, CA
33608 Ortega Highway
San Juan Capistrano, CA 92675-2042

Last Updated: November 29, 2021

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.