Immune Complex Panel
Ordering Recommendation

Detect circulating immune complexes.

Quantitative Flow Cytometry/Semi-Quantitative Enzyme-Linked Immunosorbent Assay
2-9 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
Plain red or serum separator tube (SST). 
Specimen Preparation
Allow complete clotting of red blood cells (up to 1 hour), then separate serum from cells within 30 minutes and freeze immediately. Transfer TWO (2) 1 mL aliquots of serum to individual ARUP Standard Transport Tubes. (Min: 0.5 mL/aliquot) 
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. 
Unacceptable Conditions
Non-frozen specimens. Specimens exposed to repeated freeze/thaw cycles. 
Raji: Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 30 days
C1q: (After separation from cells): Ambient: 2 hours; Refrigerated: Unacceptable; Frozen: 2 weeks (avoid repeated freeze/thaw cycles) 
Reference Interval
Available Separately
Reference Interval
0050301C1q Binding AssayEffective February 19, 2019
Less than or equal to 3.9 µg Eq/mL
0050302Raji Cell Immune Complex AssayBy report

Interpretive Data
Less than or equal to 3.9 µg Eq/mL is considered negative for circulating complement binding immune complexes. Circulating immune complexes may be found without any evident pathology and positive results do not necessarily implicate the immune complex in a disease process. Many autoimmune disorders, chronic infections and malignancies are associated with circulating immune complexes. Quantitation of immune complexes assists in staging immunologic disorders.

Compliance Statement A: For laboratory developed tests using a manufacturer labeled ASR as the reagent providing the specificity of the assay. Analyte Specific Reagent. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, the FDA has determined that such clearance or approval is not necessary.

Immune complexes bind to Raji Cells via their complement receptors. The immunoglobulin portion of the immune complex is then detected by flow cytometry with anti-human IgG-FITC.
Hotline History
View Hotline History
Component Test Code*Component Chart NameLOINC
0050301C1q Binding Assay27831-7
0050302Raji Cell Immune Complex Assay10864-7
* 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.
  • C1q Immune Complexes
  • C3d and C1q binding
  • CIC
  • Circulating Immune Complex Panel