Epic Code LAB151 C4 Complement, Blood Level
Test Name Alias
C4 Complement Blood Level | C4 | 8489 | SHO8489 | 1230100422
Interface Order Alias
10021
Quick Collect
+S/R
Collection Instructions
Specimen Collection: Blood
Container(s): Gold Top (Serum Separator-SST Gel) or Light Green Top (Lithium Heparin Gel)
Minimum Volume to Collect: 2.0 mL
Neonate Volume to Collect: 1.0 mL
Capillary collect ok? Yes
Microtainer acceptable: Yes
Collection Instructions:
- C3 and C4 can be run off of same 1 mL of serum or plasma.
- After collection, gently invert tube 8-10 times.
- Specimen should be processed within 2 hours See Processing Instructions.
Processing Instructions (Laboratory, Outpatient or Off-site collection)
- Processed Specimen: Serum or Plasma
- Centrifuge/Spin: Yes
- Aliquot: Yes
-
Processing Instructions:
- Serum is preferred specimen type
- Green Tube/Plasma: Centrifuge after collection.
- Gold Tube/Serum: Allow blood to clot for 30 minutes in a vertical position and centrifuge within 2 hours.
- Minimum volume: 1.0 mL Serum or Plasma
- Transport Temperature: Refrigerated
Specimen Transport Temperature
Refrigerate
Specimen Stability
Ambient: 8 hours
Refrigerate: 72 hours
Frozen: aliquot plasma/serum for longer storage
Laboratory Retention: 72 hours
Test Frequency
Available daily, usual TAT 1 day.
Reference Range
10 - 40 mg/dL
Performing Department
Chemistry
Performing Department Laboratory Location
Corewell Health Reference Laboratory, Grand Rapids, MI
Corewell Health Lakeland St. Joseph Laboratory, St. Joseph, MI
Methodology
Immunoturbidimetric
CPT
86160
CDM Code
3028616004
Epic Test ID
1230100422
LOINC
C4: 4498-2
Mayo Access Code
SHO8489
Reviewed Date
3/7/2024
Orderable Regions
Southwest; West
Updated Date
12/2/2025 - Gold Top Preferred specimen