From what I understand, this should be fine. However! You won't have the full 6 months to enter the US after receiving the approval. The 6 months to enter the US timing starts to tick away based on the medical. So for instance, medical is April 26, Interview is June 26 - Latest time to enter the US after approval would be October 26. The closer the medical to the interview date, that more time you have to the enter the US after approval.
Please someone correct me if I am wrong! This is what I have seen on some threads in the past.
Edit: Crazy Cat confirmed above