CPT® Code 81470

X-linked intellectual disability (XLID) (eg, syndromic and non-syndromic XLID); genomic sequence analysis panel, must include sequencing of at least 60 genes, including ARX, ATRX, CDKL5, FGD1, FMR1, HUWE1, IL1RAPL, KDM5C, L1CAM, MECP2, MED12, MID1, OCRL, RPS6KA3, and SLC16A2

The CPT® Code 81470 pertains to molecular genetic testing specifically designed for the evaluation of suspected X-linked intellectual disability (XLID), which can be either syndromic or non-syndromic in nature. This testing involves a genomic sequence analysis panel that must include the sequencing of at least 60 genes, which are critical for identifying potential genetic causes of intellectual disability. The genes included in this panel are ARX, ATRX, CDKL5, FGD1, FMR1, HUWE1, IL1RAPL, KDM5C, L1CAM, MECP2, MED12, MID1, OCRL, RPS6KA3, and SLC16A2, among others. Intellectual disability (ID) is characterized by significant limitations in both intellectual functioning and adaptive behavior, which manifests before the age of 18. Typically, individuals with ID have an intelligence quotient (IQ) of 70 or below, accompanied by challenges in at least two of the following areas: communication, social skills, self-direction, functional academic skills, utilization of community resources, occupational abilities, leisure activities, and health and safety management. In many instances, XLID presents as non-syndromic, meaning that affected individuals may not exhibit any additional physical or clinical features that could assist in diagnosis. Males are often more severely affected, displaying moderate to severe intellectual disabilities, while carrier females may experience milder symptoms. The testing process involves analyzing whole blood or isolated DNA to assess the specified genes using advanced massively parallel sequencing techniques. Additionally, to identify deletion or duplication mutations, DNA from whole blood is subjected to a gene-targeted comparative genomic hybridization (CGH) array. The use of CPT® Code 81470 allows for the reporting of genomic sequence analysis for genes associated with XLID, excluding those identified through duplication or deletion patterns, which are reported under CPT® Code 81471.