Yes,

You can surely go for diploma in family medicine after bams.

Some of the good medical colleges are

1. Cmc,vellore Rank 1

2. St. Johnes medical college, banglore Rank 14

3. CSI kalyani multispeciality hospital, chennai

4. Institute of health and family welfare, Kolkata

You can get further information here at

https://www.careers360.com/courses/diploma-in-family-medicine