Increasingly, there are two ObamaCares.There’s the one in coastal and northern areas, where the marketplaces include multiple insurers and plans. And there’s the one in southern and rural areas, where there is often little competition, a situation that can lead to higher premiums.”There’s really two kind of stories that are playing out,” said Cynthia Cox, who studies insurer competition at the Kaiser Family Foundation.The trend is likely to be accelerated by the departure of Aetna and UnitedHealthcare from ObamaCare marketplaces in 2017. The loss of those insurers won’t affect all parts of the country equally, experts say. “The combined effect of these exits is mostly concentrated in southern states and particularly rural counties within those states,” Cox said. According to an analysis from the consulting firm Avalere, as of now, there will be just one insurer offering ObamaCare coverage next year in seven states: Alabama, Oklahoma, South Carolina, Wyoming, Alaska, North Carolina and Kansas. It is possible that more insurers could enter these markets before next year.In one county in Arizona, there might not be an ObamaCare plan available at all.