How would you report the Z3A.- code in the setting of multiple gestations where different gestational ages are given to different fetuses? We had an OB ultrasound case today with twins and dates for fetus A being 8w3d (Z3A.08) and fetus B being 9w4d (Z3A.09). Would you code to the youngest date (Z3A.08), the oldest date (Z3A.09), or are we able to code both (Z3A.08, Z3A.09)?
If you are billing 76801 and 76802, then each US code would get a separate Z3A code. If you are billing 76815, it is best to use both.