Maternal care for hereditary disease in fetus, fetus 2

This code signifies antenatal care provided to a pregnant patient due to a suspected or confirmed hereditary disease in the second fetus of a multiple gestation pregnancy. This includes situations where the fetus is at risk of inheriting a genetic disorder from either parent or has been diagnosed with such a condition.

Apply this code when documentation indicates maternal management for a hereditary disease affecting Fetus 2. This typically involves genetic counseling, advanced fetal monitoring, or diagnostic procedures (e.g., amniocentesis, chorionic villus sampling) specifically due to the genetic concern for the second fetus. Supporting documentation would include genetic test results, family history of genetic disorders, or abnormal ultrasound findings suggestive of a hereditary condition in Fetus 2.

• Always specify the correct fetus number (e.g., Fetus 1, Fetus 2, etc.) when coding for multiple gestations.
• Do not use this code for congenital anomalies that are not hereditary in nature; refer to codes within O35.1- for non-hereditary fetal anomalies.
• Sequence this code as a secondary diagnosis following the primary reason for the encounter, if applicable, or as the principal diagnosis if the hereditary disease in Fetus 2 is the sole reason for the maternal care.