According the US News’ ranking of the top graduate schools here are:

Top 10 medical schools (research)

1. Harvard University

2. Johns Hopkins University

Washington University in St. Louis

4. Duke University

University of Pennsylvania

6. University of California San Francisco

7. Columbia U. College of Physicians and Surgeons

8. Stanford University

University of Michigan Ann Arbor

10. Yale University

Top 10 medical schools (primary care)

1. University of Washington

2. Oregon Health & Science University

3. University of California San Francisco

4. Mich. State U. Coll. of Osteopathic Medicine

5. University of Minnesota Duluth

6. University of California San Diego

University of New Mexico

University of Wisconsin Madison

9. University of Iowa (Roy J. & Lucille A. Carver)

University of Minnesota Twin Cities

University of Rochester

Best wishes!

Check em out!