As with many posts here, the note is required to make sure the question matches the documentation. I field many questions every day at work and only a few match the note once I read it.
My concern is the statement, 'From which size would you add the margins to get the diameter?" You cannot add margins to the post ED&C site if the provider is not saying the size of that defect plus 'xxmm margins' was excised. If they do not tell you the margins you can't assume anything.
Excisions are often larger than the lesion plus margins for closure issues and that is why you have to use the lesion plus margins and not the final defect size or other poorly worded documentation.
Dee
CPC, CPMA, CPCD