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To view specimen requirements and codes please select your laboratory:

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C3 Nephritic Factor (C3NEF)

Test Code


CPT Code(s)


Preferred Specimen(s)

1 mL serum collected in red-top tube (no gel)

Minimum Volume

0.5 mL

Collection Instructions

Ship specimen frozen on dry ice

Transport Container

Plastic screw-cap vial

Transport Temperature


Specimen Stability

Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen: Indefinitely

Reject Criteria

Received room temperature • Received refrigerated


Immunofixation Electrophoresis (IFE)

This assay is used for clinical purposes and was developed, and its performance characteristics have been determined by National Jewish Health. It has not been cleared or approved by the U.S. Food and Drug Administration. The FDA has determined that such clearance or approval is not necessary. This laboratory is certified under the Clinical Laboratory Improvement Amendments of 1988 (CLIA-88) as qualified to perform high complexity clinical laboratory testing.

Performing Laboratory

National Jewish Center Imm Med
1400 Jackson Street
Denver, CO 80206-2761

Setup Schedule

Set up: Batched

Reference Range(s)

0-0.30 Ratio
(Ratio between C3 and C3 fragment peaks)

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided 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 payer being billed.

LOINC assignment is based on a combination of test attributes, including the method used by the performing laboratory. For tests not performed by Quest Diagnostics, codes are assigned by the performing laboratory.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.