Mat care cnsl malf/damag fts, agenesis corpus callosum, unsp

This code signifies maternal care provided due to a suspected or confirmed agenesis of the corpus callosum in the fetus. Agenesis of the corpus callosum is a congenital brain malformation where the structure connecting the two cerebral hemispheres is partially or completely absent. This code is used when the specific type of agenesis is not further specified or is not applicable.

Use this code when a pregnant patient is receiving monitoring, diagnostic testing, or management specifically because of a fetal diagnosis or suspicion of agenesis of the corpus callosum. Documentation should clearly indicate the maternal care is related to this specific fetal CNS malformation, often identified via prenatal ultrasound or MRI.

• Always sequence this code as a secondary diagnosis following the primary obstetric code (e.g., O09.- for supervision of high-risk pregnancy).
• Ensure documentation specifies "agenesis of the corpus callosum" and not a general "CNS malformation" to justify this specific subcategory.
• Do not use this code if the fetal CNS malformation is definitively identified as something other than agenesis of the corpus callosum; instead, select the appropriate O35.0- subcategory.