Score 4.6 - 5.0 (In order of ratings)
-Harvard, JHU, Duke, Stanford
Score 4.1 - 4.5
-Wash U St. Louis, UPenn, UCSF, UWSOM, UCLA, Yale, Columbia, Michigan, Pitt, Chicago, Vanderbilt, Cornell, UNC Chapel Hill, UT Southwestern
Score 3.6 - 4.0
-Baylor, UCSD, Emory, Northwestern, Case Western, Mayo, Mt. Sinai, UVA, UAB, Colorado, Wisconsin-Madison, Brown, Dartmouth, Iowa, NYU, Oregon, Minnesota, Georgetown, Tufts
Score 3.1 - 3.5
-Ohio State, Rochester, USC, Einstein, Cincinnati, Wake Forest, Boston, UCI, Maryland, Indiana, UCD, Florida, Utah, U Mass, Med College Wisc, UConn, Miami, Tulane, UI Chicago, UT Houston, UT Galveston, Vermont, Jefferson, Med College SC, GW, Loyola Stritch, Rush, SLU, Texas A&M, UMDNJ RWJ, USUHS, Arizona, Louisville, Nebraska, Tennessee, VCU
Score 2.6 - 3.0
-Everything else
I think of the peer assessment ratings are more important than the research rankings and a more clear indicator of the quality of medical schools. I consider these to be the Tiers of medical schools. You can argue with me, but this is what I believe.
Source: US News and World Report 2009 Rankings