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
2 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