Mat care cnsl malf/damag fts, holoprosenceph, fetus 3

This code signifies maternal care provided due to the suspicion or confirmed diagnosis of holoprosencephaly in a fetus. Holoprosencephaly is a severe congenital brain malformation where the prosencephalon (forebrain) fails to properly divide into two cerebral hemispheres. This specific code indicates that the care is for the third fetus in a multiple gestation pregnancy.

Apply this code when a pregnant patient is receiving medical attention because imaging (e.g., ultrasound, MRI) or genetic testing suggests the presence of holoprosencephaly in one of the fetuses, specifically the third one. Documentation should clearly state the suspected or confirmed diagnosis of holoprosencephaly and specify that the care is related to the third fetus.

• Ensure the documentation clearly identifies the affected fetus as the "third fetus" in a multiple gestation.
• Do not use this code if the central nervous system malformation is not holoprosencephaly; other O35 subcategories exist for different malformations.
• Sequence this code as a secondary diagnosis following the code for the primary reason for the encounter, if applicable (e.g., routine prenatal care).