Ordering Recommendation

Follow-up test for complement activity screening when CH50 and AH50 are low or absent and high suspicion remains for complement deficiency.

Mnemonic
COMP 9
Methodology

Quantitative Radial Immunodiffusion

Performed

Varies

Reported

4-11 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Plain red. Also acceptable: Lavender (EDTA) or white (PPT).

Specimen Preparation

Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.1 mL)
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.

Storage/Transport Temperature

Ambient. Also acceptable: Refrigerated; Frozen.

Unacceptable Conditions

Grossly hemolyzed or severely lipemic specimens.

Remarks
Stability

Ambient: 2 weeks; Refrigerated: 2 weeks; Frozen: 2 weeks

Reference Interval

By report

Interpretive Data



Compliance Category

Performed by non-ARUP Laboratory

Note
Hotline History
N/A
CPT Codes

86160

Components
Component Test Code* Component Chart Name LOINC
0099076 Complement Component 9 4510-4
* 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
  • C9
Complement Component 9

Quest Diagnostics San Juan Capistrano Inc.