Can a radiologist do general practice alongwith with working as a radiologist?

Can a radiologist do general practice alongwith with working as a radiologist?

Edit after some remarks : There was a query on the group that can 2 degree holders for example radio and dermat practice both? Alot of people said no. So that way would anyone object a practicing radiologist to practice general medicine in his own clinic?

Can a person have 2 MD degrees eg MD radio diagnosis and MD medicine

P.S Asking for a friend,