Transplant Immune Cell Function Assays (CPB 0773, reviewed 2025-12-23)
Aetna has updated its transplant immune cell function assay policy (CPB 0773) to establish narrow coverage for the ImmuKnow Assay ONLY for adjudicating over-immunosuppression in transplant recipients with co-morbid infection or cancer. All other immune cell function assays and indications—including CMV risk stratification, rejection prediction, and post-transplant monitoring—are now classified as experimental/investigational and not covered. Billing teams must immediately stop billing these assays for non-covered indications to prevent claim denials.