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Test Code: 8
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Clinical Utility

C4 is a component of the complement system, and has a fundamental role in the inflammatory response and immune system functionality. Diagnosis cannot be made and treatment must not be given on the basis of C4 measurements alone. Clinical history and other laboratory findings must be taken into account.


Turbidimetry using specific antiserum to C4. This test has been cleared or approved for diagnostic use by the U.S. Food and Drug Administration.

7 business days from receipt of specimen

Specimen Type Order Code CPT Code NY Approved Volume Assay Range Special Instructions
serum 8 86160 No 1 mL (min. 200 uL) 19-48 mg/dL
  • Collect 1 mL, no special shipping requirements.

Specimens are approved for testing in New York only when indicated in the Specimen Information field above.

The CPT codes provided are based on Viracor Eurofins' interpretation of the American Medical Association's Current Procedural Terminology (CPT) codes and are provided for general informational purposes only. CPT coding is the sole responsibility of the billing party. Questions regarding coding should be addressed to your local Medicare carrier. Viracor Eurofins assumes no responsibility for billing errors due to reliance on the CPT codes illustrated in this material.

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