Yes it does.
For Example: Ralph H. White, M.D.
Source: http://new-www3.uark.edu/qwct/resources/handouts/33%20Commas--%20Almost%20Everything%20You%20Need%20to%20Know.pdf
Not necessarily. Commas are a feature of sentence structure.
Yes, a comma is typically used before "MD" when it follows a person's name. For example, you would write "John Smith, MD." This helps to separate the name from the title for clarity. However, if the MD is used in a sentence where the title is essential to the context, the comma may be omitted.
No, before ... as in: Marcus Welby, MD
Yes, a comma is typically used before "MD" when it follows a person's name in a professional context, such as "John Smith, MD." This usage helps to separate the name from the title and clarifies the person's qualifications. However, if "MD" is used in a more casual or informal context, the comma may be omitted.
No, a comma does not go before the word 'in'.
Yes. You should write it at John P. Doe, MD
Not necessarily. There is no word in English that requires a comma before or after it.
no
No.
After
after
Before