Health insurance premiums on New York's state-run exchange will go up by an average of 7.1% next year, but rates differ greatly by payer, plan type and region. "It's not all that surprising to see a wide range of premium increases," said Josh Weisbrod, a partner with Bain & Company's Healthcare practice. "This is the first year where the participating payers were able to use actual trend data on the exchange enrollees."