President Obama’s health care law was supposed to expand choice for consumers. But with just weeks to go before open enrollment begins on the law’s subsidized insurance exchanges, it’s increasingly looking like the array of plans and providers being offered will fall short of the program’s ambitions.

In New Hampshire, for instance, Anthem Blue Cross Blue Shield is the only insurer offering coverage on the state’s exchange. Even more strikingly, the plans it will be selling through the exchange will have a relatively limited provider network.