Male with structurally abnormal sex chromosome

This code signifies a male individual diagnosed with a sex chromosome abnormality that involves a structural deviation from the typical XY complement, rather than an aneuploidy (e.g., Klinefelter syndrome). This includes conditions like deletions, duplications, or translocations affecting the X or Y chromosome in a male karyotype. These structural changes can lead to a spectrum of clinical presentations, including reproductive issues, developmental delays, or specific physical characteristics.

Assign this code when documentation explicitly states a male patient has a structurally abnormal sex chromosome, confirmed by cytogenetic analysis (karyotype). This is appropriate for conditions such as Xq deletion, Yq deletion, or X;Y translocations, where the overall chromosome number is typically 46, but the structure of the sex chromosomes is altered. The medical record should clearly specify the structural nature of the abnormality.

• Do not use this code for numerical sex chromosome abnormalities like Klinefelter syndrome (47, XXY), which has its own specific code.
• Ensure the documentation specifies "structural abnormality" rather than just "sex chromosome abnormality" to differentiate from aneuploidies.
• Sequence this code as a primary diagnosis when the sex chromosome abnormality is the reason for the encounter or the underlying cause of the patient's condition.