Trisomy 13, unspecified

This code represents Patau syndrome, a severe chromosomal disorder characterized by the presence of an extra copy of chromosome 13. It typically results in multiple congenital anomalies affecting various organ systems, including the brain, heart, kidneys, and facial structures.

Use this code when documentation confirms a diagnosis of Trisomy 13 (Patau syndrome) without further specification of a particular type (e.g., full, partial, or mosaic). This diagnosis is often made prenatally through genetic testing or postnatally based on clinical features and confirmed by karyotyping.

• Do not use this code if the specific type of Trisomy 13 (e.g., partial or mosaic) is documented; instead, use the more specific code.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter.
• Ensure supporting documentation clearly states "Trisomy 13" or "Patau syndrome" and does not specify a variant.