Other specified sex chromosome abnormalities, male phenotype

This code signifies a male individual presenting with a sex chromosome abnormality not otherwise classified, where the phenotype is distinctly male. It encompasses various rare or atypical sex chromosome aneuploidies or structural rearrangements that result in a male appearance.

Use this code for male patients diagnosed with sex chromosome abnormalities like mosaicism (e.g., 46,XY/47,XXY) or other complex rearrangements that don't fit more specific codes. Documentation should clearly state the specific chromosomal abnormality and confirm the male phenotype.

• Ensure the documentation explicitly states "male phenotype" to support this code.
• Avoid using this code if a more specific sex chromosome abnormality code (e.g., Klinefelter syndrome) is available.
• Always review the full karyotype report and geneticist's interpretation for precise coding.