to be honest I don't really understand what you are trying to say, so it's hard to make it sound more natural.
"Increases of health insurance in Virginia already in procession ranged from 15-64% varied by insurance companies and products."
increases of health insurance already in procession - do you mean health insurance claims?
And what does the percentage increase refer to (what's it being compared to?)
"varied by" isn't right either, I don't understand what you mean by it.
Sorry I can't be of more help, if you write down the main facts in simple English in two or three sentences, I can help you restructure it into something that makes more sense.