Days Set Up
Daily, 24 hrs
Analytic Time

2 hours

MiChart Code
C3 Complement
Soft Order Code
C3

Test Updated:

Synonyms

C3
B1C/B1A
C3
Complement C3
Third Component of Complement
C3 COMPLEMENT

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Test Overview

Test Methodology

Immunoturbidimetric

Test Usage

Quantitation of C3 is used to detect individuals with inborn deficiency of this factor or those with immunologic disease in whom complement is consumed at an increased rate. Increased levels are found in numerous inflammatory conditions as an acute phase reactant. Acquired deficiency is encountered in active lupus and glomerulonephritis. May be decreased in immune complex disease, serum sickness, chronic active hepatitis, inborn C3 deficiency and subacute bacterial endocarditis (SBE).

Reference Range

Adult: 83-240 mg/dl

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Offsite

Collect specimen in an SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate up to 8 days or freeze for longer storage.

Yellow Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum

Billing Information

CPT Code
86160
Pro Fee Code
 
LOINC
4485-9

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.