CPT Code: 86160
Order Code: 351
ABN Requirement: No
Specimen: Serum
Volume: 1.0 mL
Minimum Volume: 0.5 mL
Container: Gel-barrier tube (SST, Tiger Top)
Collection:
- Collect and label sample according to standard protocols.
- Gently invert tube 5 times immediately after draw. DO NOT SHAKE.
- Allow blood to clot 30 minutes.
- Centrifuge for 10 minutes.
Transport: Store serum at 2°C to 8°C after collection and ship the same day per packaging instructions included with the provided shipping box.
Stability:
Ambient (15-25°C): Not Acceptable
Refrigerated (2-8°C): 4 days
Frozen (-20°C): 21 days
Causes for Rejection: Specimens other than serum; improper labeling; samples not stored properly; samples older than stability limits
Methodology: Immunoturbidimetric
Turn Around Time: 2 to 3 days
Reference Range:
| Age | Male | Female |
| <1 Year | Not established | Not established |
| 1-14 Years | 80-170 mg/dL | 82-173 mg/dL |
| 15-80 Years | 82-185 mg/dL | 83-193 mg/dL |
| ≥81 Years | Not established | Not established |
Clinical Significance: Decreased C3 may be associated with acute glomerulonephritis, membranoproliferative glomerulonephritis, immune complex disease, active systemic lupus erythematosis, and generalized autoimmune processes.
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.