Anatomy scan

So I had my 20 week anatomy scan a bit ago and they got most of the pictures they needed but, baby boy had his legs over his head so they couldn’t get all the pictures they needed so I’m scheduled to go back next week to get the rest. Instead of going to my regular doctor for the ultrasound, like they usually do, they are sending me to another facility and I looked them up online and it’s a high risk doctor.

So far blood work has been good and the ultrasound last time was fine. Any ideas why they would send me to a high risk doctor?