Test Code: 50420
Cpt Code:86001 (x1)
Clinical UtilityThe clinical utility of food-specific IgG tests has not been established. These tests can be used in special clinical situations to select foods for evaluation by diet elimination and challenge in patients who have food-related complaints. It should be recognized that the presence of food-specific IgG alone cannot be taken as evidence of food allergy and only indicates immunologic sensitization by the food allergen in question. This test should only be ordered by physicians who recognize the limitations of the test. The reference range listed on the report is the lower limit of quantitation for the assay.
ProcedureEnzyme immunoassay (FEIA). A standard curve is used to calculate the specific IgG concentrations. The calibrators are referenced to the International Reference Preparation for serum immunoglobulins. This test has not been cleared or approved for diagnostic use by the U.S. Food and Drug Administration.
The units are micrograms/mL of specific IgG. The reference varies by allergen.
|mcg/mL of IgG|
|Lower Limit of Quantitation*||2.0|
|Upper Limit of Quantitation**||200|
Reference ranges vary by allergen.
Turnaround TimeSetup: M-F. TAT 3 business days from receipt of specimen
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.
Position Statement 12 April 1990 published in Immunology and Allergy Practice.
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