The top colleges in the world for PG courses after MBBS are-

• HARVARD MEDICAL SCHOOL
• MEDICAL SCIENCE DIVISION- OXFORD UNIVERSITY
• SCHOOL OF CLINICAL MEDICINE-CAMBRIDGE UNIVERSITY
• STANFORD UNIVERSITY SCHOOL OF MEDICINE
• DAVID GEFFEN SCHOOL OF MEDICINE- UNIVERSITY OF CALIFORNIA
• THE JOHN HOPKINS UNIVERSITY SCHOOL OF MEDICINE-JOHN HOPKINS UNIVERSITY
• YALE SCHOOL OF MEDICINE
• UCL MEDICAL SCHOOL
• UCSF DEPARTMENT OF MEDICINE
• IMPERIAL COLLEGE SCHOOL OF MEDICINE

I hope this helps. Wish you a great eve!