Although New York state regulators have threatened to block CVS Health’s proposed acquisition of Aetna Inc. over concerns about price hikes for consumers, it’s unlikely that the deal will be derailed, corporate lawyers said. But they added that given these worries, it’s probably not a done deal just yet.

“In my general experience, when something is approved at the federal level, it’s highly unlikely that it doesn’t ultimately get approved at the state level,” said Shannon Zollo, a partner in Boston-based Nutter McClennen & Fish’s corporate and transactions department and chair of the firm’s mergers and acquisitions practice group. “But I wouldn’t be surprised if the states require some additional concessions in order to approve the deal.”