Test Overview
Test Methodology
Radioimmunoassay (RIA)
Test Usage
Elevated C4a levels are indicative of classical and/or lectin pathway activation.
Reference Range *
0 - 2830 ng/mL
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Test Details
Days Set Up
Monday - Friday
Analytic Time
9 - 12 days
Soft Order Code
FC4AL
MiChart Code
C4ades Arg Level (Sendout)
Synonyms
- C4ades Arg Level
Laboratory
Sendout
Reference Laboratory
Mayo FC4AL (National Jewish Health C4AR)
Section
Special Testing
Specimen Requirements
Collection
Collect specimen in a lavender top tube. Mix well, centrifuge, and aliquot plasma into a plastic vial within 30 minutes of collection. Freeze immediately.
Special Handling
Must arrive in lab or aliquot and freeze within 30 minutes.
Normal Volume
1.5 mL EDTA plasma
Minimum Volume
0.5 mL EDTA plasma
Additional Information
Test sent to Mayo Medical Laboratories; performed by National Jewish Health.
Billing
CPT Code
86160
Fee Code
AA388
NY State Approved
No