Skip to main content

Specimen Collection Manual and Test Catalog

  or
  or
  or

COMPLEMENT COMPONENT C1Q

Geisinger Epic Procedure Code:  LAB4088    Geisinger Epic ID:  16280

SPECIMEN COLLECTION
Specimen type: 

Serum or plasma


Preferred collection container: 
Alternate collection container: 
6 mL red-top (plain, non-serum separator) tube
3 mL lavender-top (K2 EDTA) tube
6 mL pink-top K2 EDTA tube
Specimen required: 

1 mL serum or plasma; minimum 0.1 mL



SPECIMEN PROCESSING
Processing instructions: 

Centrifuge within one hour of draw time and aliquot


Transport temperature: 

Refrigerated.


Specimen stability: 

Room temperature: 4 days. Refrigerated: 10 days. Frozen: 29 days.


Rejection criteria: 

Gross hemolysis • Gross lipemia



TEST DETAILS
CPT code(s):  86160
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Methodology: 
Radial Immunodiffusion
Synonyms: 

Quest test code 981


Clinical significance: 

The complement system is critical to the inflammatory response. C1q concentrations may be decreased in patients with acquired angioedema, immune complex induced vasculitis, and concurrent low concentrations of C1 inhibitor, carcinoma, or lymphoma.


Review Date:  12/16/2024

Performing Locations