CPT® Code 81229

Cytogenomic (genome-wide) analysis for constitutional chromosomal abnormalities; interrogation of genomic regions for copy number and single nucleotide polymorphism (SNP) variants, comparative genomic hybridization (CGH) microarray analysis

CPT® Code 81229 refers to a specific type of molecular genetic testing known as cytogenomic analysis, which is utilized to identify constitutional chromosomal abnormalities. This procedure involves a genome-wide analysis that interrogates genomic regions for both copy number alterations (CNA) and single nucleotide polymorphism (SNP) variants. The primary technique employed in this analysis is comparative genomic hybridization (CGH) microarray analysis. This method is particularly significant in the context of cancer genomics, as cancer cells often exhibit numerous CNAs, which can be critical for understanding the genetic underpinnings of various cancers. By utilizing SNP arrays, this testing achieves enhanced detection capabilities, providing higher resolution insights at the individual gene level. Furthermore, these cytogenomic techniques are not limited to cancer testing; they can also be applied in genome-wide association studies to analyze matched cohorts, whether they are affected by a disease or not, thereby contributing to a broader understanding of genetic variations across populations.