Yes, there is a big difference. However, Dr. David Diamond, MD practices medicine at Newton, Massachusetts and Boston, Massachusetts and specializes in addiction psychiatry.
see post #12
Yup,I found that in my search.However,this piece specifically states that he has a practice in Dover,New Hampshire.Having searched the State of New Hampshire's Physician Licensing Board's website I've found that he's not licensed to practice medicine in that state.
I could be wrong but my guess is that "David Diamond" being a not-uncommon name we're talking about two different individuals.Or,perhaps,this piece was in error in having stated he practiced in NH.Perhaps he just lives there and practices in Newton.
My guess is that this is the guy we're talking about.
I worked at a major Boston hospital for decades so,while I don't know much about this big world of ours,I know something about the medical biz. :-)