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COMPLEMENT C4

Test Code
LAB151


CPT Codes
86160

Preferred Specimen
Green top Gel/ Li Hep


Minimum Volume
2.0 mL


Transport Container
Li Heparin (GST)


Transport Temperature
Refrigerate specimen


Methodology
Immunoturbidimetric

Setup Schedule
Set Up:Daily Report Available:1 day


Reference Range
Compliment C4   15-46 mg/dL


Clinical Significance
Immunoturbidimetric assay for the determination of human C4 and its degradation products in human serum and plasma. Lowered concentrations or the complete absence of C4 occurs in immunocomplex diseases, systemic lupus erythematosus (SLE), autoimmune thyroiditis and juvenile dermatomyositis. Infections such as baterial and viral meningitis, streptococcal sepsis and pneumonia are associated with a fall in C4. As an acute phase protein, C4 is increased during inflammatory processes. It is elevated in systemic infections, non-infectious chronic inflammatory conditions (primarily chronic polyarthritis) and physiological states (pregnancy).


Performing Laboratory
GBMC Chemistry



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.