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Excellus BlueCross BlueShieldCommercial · Coverage · Genetic Disease (Inherited Disease) · NY · Genetics, PediatricsMedium impact

Whole Exome and Whole Genome Sequencing for Diagnosis of Genetic Disorders 2.02.46

Effective date
Sep 17, 2026
Identified
Jun 20, 2026

Summary

Policy 2.02.46 considers whole exome sequencing, with trio testing when possible, medically appropriate for an unexplained congenital or neurodevelopmental disorder only when all criteria are met: a genetic cause is the most likely explanation despite previous genetic testing, the clinical presentation does not fit a single well-described syndrome or an invasive next step is needed, a clinician with expertise in clinical genetics has evaluated the patient and counseling about the risks of genetic testing is documented, the diagnosis cannot be established by standard clinical work-up, and there is potential for a change in management and clinical outcome. Whole mitochondrial genome sequencing may be considered when signs and symptoms of a mitochondrial disorder are present and genetic testing may eliminate the need for muscle biopsy. Whole genome sequencing, prenatal and preimplantation exome or genome sequencing, repeat exome or genome sequencing, and the EpiSign epigenetic assay are listed as investigational for the diagnosis of genetic disorders.

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What to do

Action · 9 steps
01Current version effective September 17, 2026: Before billing whole exome sequencing for an unexplained congenital or neurodevelopmental disorder, confirm the record documents at least two of the six listed findings, such as an abnormality affecting at least one organ system, significant developmental or intellectual delay, a family history strongly suggesting a genetic etiology, unexplained developmental regression, inability to explain symptoms by other causes, or biochemical findings suggestive of an inborn error of metabolism.
02Confirm the record documents either a clinical presentation that does not fit a single well-described syndrome or an invasive next diagnostic step such as muscle biopsy.
03Confirm the record includes an evaluation by a clinician with expertise in clinical genetics, with family history, a phenotype description, and counseling about the risks of genetic testing, and that standard clinical work-up cannot establish or confirm the diagnosis.
04Where no previous genetic testing was completed, document a valid justification for why chromosomal microarray and/or targeted gene testing is not appropriate for the member.
05Where family history or phenotype suggests a specific syndrome, document targeted testing for the associated mutation before more extensive testing, or document the rationale for more extensive testing.
06Document how the test results will affect treatment or medical management, since testing should be performed for management or treatment and not only for knowledge purposes.
07Confirm the performing laboratory is certified under CLIA.
08Trio testing of the child and both parents is the recommended option when possible.
09Confirm the member has a valid contract, because coverage is not provided for family members without a valid contract.

Codes mentioned

81401814038140481405814068140781408814158141681417814258142681427814408146081465

Original notice

Whole Exome and Whole Genome Sequencing for Diagnosis of Genetic Disorders 2.02.46
excellusbcbs.com · Always check the source before changing claims.
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