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Aspergillus fumigatus Mix Gel Diffusion

Test Code: 75225

Cpt Code:

86331 (x1)

Clinical Utility

The measurement of serum precipitins by gel diffusion is a commonly used technique to assess exposure and sensitization to various antigens. They are usually of the IgG or IgM class.


In ouchterlony gel immunodiffusion the sample and the antigen are placed in opposing wells cut in a uniform layer of agarose. This test has not been cleared or approved for diagnostic use by the U.S. Food and Drug Administration.

Assay Range


Turnaround Time

Setup: Tuesday and Friday. TAT 3-5 business days from receipt of specimen

Specimen Information


NY approved. 0.5 mL serum, ambient, frozen or refrigerated

4 weeks ambient
4 weeks refrigerated
4 weeks frozen


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-IBT's 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-IBT assumes no responsibility for billing errors due to reliance on the CPT codes illustrated in this material.


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