What we are telling you is that it isn't a drinking problem, or a drug problem, or even, most likely, a mental health problem. Most abusers don't suffer from any of those issues. It's a power and control/domestic violence issue. Chances are he has treated previous girlfriends the same way, and will treat future girlfriends the same way.
It's not a matter of getting him to a doctor. It's a matter of protecting yourself, which means making a safe and speedy exit from the relationship.