Complement Component 2

Test Code

COMC2

Alias/See Also

C2, C2 Level, Second component of complement, complement classical pathway, Classical Pathway - Complement, C2 Antigen, 0050148

CPT Codes
86160

Preferred Specimen

1 Gold SST

Minimum Volume

0.3 mL

Instructions

Allow specimen to clot for 1 hour at room temp. Separate serum from cells ASAP or within 2 hours of collection. Transfer 1mL serum to an ARUP Standard Transport Tube and freeze immediately.

Transport Container

ARUP Standard Transport Tube

Transport Temperature

CRITICAL FROZEN. Separate specimens must be submitted with multiple tests are ordered.

Specimen Stability

15-30C up to 2 hours
2-8C up unacceptable
-20C up to 2 weeks

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

Non-frozen specimens. Specimens exposed to repeated freeze/thaw cycles. Specimens left to clot at refrigerated temperature.

Methodology
Quantitative Radial Immunodiffusion

FDA Status
LDT

Setup Schedule

Mon, Thur

Report Available

5-10 days

Reference Range

1.6 - 4.0 mg/dL

Clinical Significance

Follow-up test for complement activity screening when CH50 is low or absent and AH50 is normal and high suspicion remains for complement deficiency.

Performed By
Alverno Laboratories

Performing Laboratory
ARUP Laboratories
Test code: 0050148

Last Updated: May 16, 2023

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.