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C1 Esterase Inhibitor Functional

Test Code: 1112
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Clinical Utility

C1 esterase inhibitor (inactivator) deficiency is the most common of the inherited complement component deficiencies. It is the cause of hereditary angioedema. Two types exist: type I, in which reduced serum levels of functionally active C1 inactivator occur, and type II, in which normal or even elevated levels of functionally inactive C1 inactivator are present.

Procedure

Enzyme immunoassay- This test has been cleared or approved for diagnostic use by the U.S. Food and Drug Administration.

7 business days from receipt of specimen

Specimen Type Order Code CPT Code NY Approved Volume Assay Range Special Instructions
serum 1112 86161 Yes

1 mL (min. 100 uL)

>68 mg/dL

  • Collect 1 mL, fresh serum.
  • Ship frozen overnight on dry ice.

Specimens are approved for testing in New York only when indicated in the Specimen Information field above.

The CPT codes provided are based on Viracor Eurofins' interpretation of the American Medical Association's Current Procedural Terminology (CPT) codes and are provided for general informational purposes only. CPT coding is the sole responsibility of the billing party. Questions regarding coding should be addressed to your local Medicare carrier. Viracor Eurofins assumes no responsibility for billing errors due to reliance on the CPT codes illustrated in this material.

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