Complement Component C2 [44842P]

Test Code
C2 (S51758)

Quest Code

CPT Codes

Preferred Specimen
1 mL serum

Minimum Volume
0.1 mL

Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top) tube

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 28 days
Refrigerated: 28 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Grossly hemolyzed, lipemic or icteric samples are to be reviewed by the Medical Director prior to testing and his/her instructions followed, including any special comment to be attached to the result.

Radial Immunodiffusion (RID)

Setup Schedule
Tues, Thurs

Report Available
2 to 4 days

Reference Range
1.6-3.5 mg/dL

Clinical Significance
The complement system is critical to inflammatory responses. C2 is a component of the classical pathway. Decreased concentrations are observed in patients with immune complex diseases such as systemic lupus erythematosus (SLE) and immune complex-induced vasculitis.

Performing Laboratory
Quest Diagnostics Nichols Institute San Juan Capistrano
33608 Ortega Hwy
San Juan Capistrano, CA 92675

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.