CommercialCoverageMedium impact
Whole Exome and Whole Genome Sequencing for Diagnosis of Genetic Disorders
Blue Cross & Blue Shield of Mississippi·MS · Genetics, Pediatrics, Critical Care +1 more·Medical Policy
We identified it
Jun 20, 2026
Summary
BCBS Mississippi updated their policy for whole exome sequencing (WES) and whole genome sequencing (WGS) coverage, establishing specific medical necessity criteria for children with unexplained genetic disorders and critically ill infants in ICU settings. The policy considers standard WES medically necessary for unexplained congenital/neurodevelopmental disorders in children when evaluated by genetics specialists, and rapid WES/WGS for critically ill infants with suspected genetic disorders.
Action Required
Immediately: Review current whole exome and genome sequencing orders to ensure they meet the new medical necessity criteria. Coordinate with genetics specialists to document required evaluations including family history, phenotype descriptions, and genetic counseling. Update prior authorization workflows to verify patients meet ALL specified criteria before submitting claims. Ensure documentation shows genetic etiology is most likely explanation and previous testing has failed to yield diagnosis.