CPT® Code 81164

BRCA1 (BRCA1, DNA repair associated), BRCA2 (BRCA2, DNA repair associated) (eg, hereditary breast and ovarian cancer) gene analysis; full duplication/deletion analysis (ie, detection of large gene rearrangements)

The CPT® Code 81164 pertains to the molecular genetic testing of the BRCA1 and BRCA2 genes, which are crucial for DNA repair and tumor suppression. Specifically, this code is used for full duplication/deletion analysis, which is designed to detect large gene rearrangements that may not be identified through standard sequencing methods. The BRCA1 gene is located on chromosome 17, while the BRCA2 gene is found on chromosome 13. Both genes play a significant role in maintaining genomic stability by repairing DNA double-strand breaks and preventing uncontrolled cell proliferation. Mutations in these genes can lead to a failure in DNA repair mechanisms, resulting in an increased risk of developing certain cancers, particularly breast and ovarian cancers in women, as well as other cancers in both genders. The prevalence of BRCA mutations is notably higher in specific populations, including those of Norwegian, Dutch, Icelandic, and Ashkenazi Jewish descent. Genetic testing for these mutations is essential for identifying hereditary cancer syndromes, guiding treatment options, and assessing the risk for family members. The analysis involves testing whole blood or buccal cells, where the genetic material is examined for variations that could indicate the presence of mutations. The full duplication/deletion analysis specifically focuses on identifying large rearrangements in the BRCA genes, which may not be detected through standard full sequence analysis. This comprehensive approach to genetic testing is vital for effective cancer risk assessment and management.