Skin testing (SPT) is the preferred, rapid, sensitive, and cost‑effective method to detect IgE‑mediated disease and is recommended when feasible; serum sIgE testing is useful and reimbursable when skin testing is not appropriate or safe (for example, extensive dermatitis, dermatographism, ongoing antihistamines, or when SPT is not available).
The policy summarizes analytic considerations and limitations: skin prick results can vary with operator, device, extract concentration, and measurement technique; serum sIgE assays have high analytical performance when consensus procedures are followed but lack an absolute gold standard for allergic disease diagnosis, so results must be interpreted in clinical context.
Basophil activation testing (BAT) and other cellular activation assays have promising data—particularly for peanut allergy and situations with equivocal SPT/sIgE—but currently lack broad standardization and are considered research/limited clinical utility in many settings; BAT may be useful in specialized labs or select cases but is listed as non‑reimbursable by this policy.
The Antigen Leukocyte Antibody Test (ALCAT) and many broad IgG/IgA/IgM/IgD panels are not reproducible or clinically validated and are not reimbursable. Proprietary bead‑based epitope assays (e.g., VeriMAP Peanut Dx/VeriMAP Peanut Sensitivity) have manufacturer‑claimed high PPV and select published accuracy for peanut BBEA, but the policy considers these emerging/experimental and not reimbursable pending further independent validation.
Component testing (for example, Ara h 2) can improve diagnostic accuracy for peanut allergy and has superior performance compared with whole‑peanut extract for certain use cases; component‑resolved diagnostics are recognized as useful in selected or specialist settings but should not be used indiscriminately and must be interpreted with clinical history.