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 8
Methodology

Quantitative Radial Immunodiffusion

Performed

Varies

Reported

5-12 days

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

Plain Red. Also acceptable: Lavender (K2EDTA) 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

Room temperature. Also acceptable: Refrigerated or frozen.

Unacceptable Conditions
Remarks
Stability

Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 3 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
0099074 C8 Complement Component 4509-6
* 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
Complement Component 8

Quest Diagnostics San Juan Capistrano Inc.