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Complement, Total (CH50)
1 mL serum
Avoid hemolysis. Centrifuge serum specimens within 1 hour of collection. Immediately pipette serum into sterile, plastic, screw-capped vial(s) and freeze solid -20°C or lower. Do not allow samples to thaw. With multiple tests, submit a separate tube for each test. Send frozen samples on dry ice to the laboratory.
Plastic screw-cap vial
Room temperature: Unacceptable
Frozen: 30 days
CSF, Pleural Fluid, Pericardial Fluid, Synovial Fluid
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153
Set up: Monday-Saturday Morning; Report available: Next day
CH50 is a screening test for total complement activity. Levels of complement may be depressed in genetic deficiency, liver disease, chronic glomerulonephritis, rheumatoid arthritis, hemolytic anemias, graft rejection, systemic lupus erythematosis, acute glomerulonephritis, subacute bacterial endocarditis and cryoglobulinemia. Elevated complement may be found in acute inflammatory conditions, leukemia, Hodgkin's Disease, sarcoma, and Behcet's Disease.
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
(The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.)
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.