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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