Boston Medical Center HealthNet Plan has named its new arm to the north. The Medicaid plan will operate in New Hampshire as Well Sense Health Plan, one of three insurers selected by health officials in that state to manage coverage for low-income and disabled residents.

The program is supposed to begin enrolling people in January, but the US Centers for Medicare & Medicaid Services have not given approval for federal money to be used for managed care in New Hampshire. It is not clear when the agency will decide.