Looking for a good dermatologist-Boston

Can Anyone here recommend a good dermatologist? My brother had a mole removed by his general practitioner down here in GA (he was here visiting during summer break). He's returned to Boston for school, only to find out that the pathology report came back showing "abnormal cells" and the general practitioner here in GA recommended him seeing a dermatologist. Since he's from GA, he's not familiar with the docs up in Boston. Can anyone from that area recommend a good dermatologist for him to go see? Any information would be helpful, thanks!