North Dakota residents shop for ACA health coverage through HealthCare.gov, the federal marketplace, since the state has not created its own exchange.
North Dakota expanded Medicaid under the ACA, so adults earning up to 138% of the federal poverty level generally qualify for the state's Medicaid program instead of needing a subsidized marketplace plan.
North Dakota's individual market has a limited number of insurers, typical of lower-population states, so it's worth comparing the available plans early in the enrollment window since choices may be narrower than in larger states. Checking network coverage in more rural western counties versus the Fargo and Bismarck areas is also worthwhile.