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0050155
Complement Component 4
C4
Ordering Recommendation
May assist in ruling out a complement deficiency.
Methodology
Quantitative Immunoturbidimetry
Performed
Sun-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect
Serum separator tube. Also acceptable: Lavender (EDTA), pink (K2EDTA), or green (lithium heparin).
Specimen Preparation
Allow specimen to clot at room temperature. Separate serum from cells ASAP or within 2 hours of collection and freeze. Transport 0.5 mL serum. (Min: 0.3 mL)
Storage/Transport Temperature
Frozen.
Unacceptable Conditions
Specimens left to clot at refrigerated temperature. Specimens exposed to repeated freeze/thaw cycles.
Remarks
Stability
Ambient: 48 hours; Refrigerated: 8 days; Frozen: 3 months (avoid repeated freeze/thaw cycles)
Reference Interval
| Test Number |
Components |
Reference Interval |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Complement Component 4 |
|
Interpretive Data
Compliance Category
FDA
Note
Hotline History
Hotline History
Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
N/A
CPT Codes
86160
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0050155 | Complement Component 4 | 4498-2 |
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
- 4th Component of Complement, Serum
- C4
- C4 Complement Serum
- C4, Serum
- Complement C4, Serum
- Fourth Component of Complement
Complement Component 4
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