Comma use after title like MD

[Acquista]

Which version of comma use is correct or are they both permissable?

A. In our featured physician interview John Smith, MD, discusses existential psychotherapy and other matters.

B. In our featured physician interview John Smith, MD discusses existential psychotherapy and other matters.

Note version A has a comma after MD and version B does not. Or would you even put a comma after interview?

Be interested to know what teachers and other think about this?

[Tdol]

Many styles recomend the comma around 'MD':
LEO Comma Rules
However, it is something that many ignore. I hink that having the three commas in the sentence mught be overkill, so I might be tempted to put the first two in and leave the third, though other may feel differently.