Narrow networks: savings at what cost?

You probably chafe a bit every time you learn that a certain doctor or hospital isn’t part of your insurance network. Narrowing the scope of your network helps insurers save money. They can drive hard bargains with doctors and hospitals to get lower prices and walk away from higher-priced ones.

Increasingly, insurers are offering narrow network plans. Would you enroll in one? So long as quality doesn’t suffer, consumers should welcome the lower premiums they may offer.

Researchers at the Leonard Davis Institute at Penn analyzed the relationship between network size and premiums for plans offered in the Affordable Care Act marketplaces. Plans with very narrow networks (covering care by less than 10 percent of physicians) charged 6.7 percent lower premiums than plans with much broader networks (covering care by up to 60 percent of physicians). This translates into an annual savings for an individual of between $212 and $339, depending on age and family size. For a young family of four, the savings could reach nearly $700 per year.

“Marketplace consumers are looking for value,” said Daniel Polsky, the University of Pennsylvania health economist who led the study. “That level of savings could be a very good deal for consumers, but whether these plans provide value depends on how they are achieving those savings.”

One way plans might save money could make it harder for patients to get care — so that they get less of it. Narrow network plans may do this if they don’t cover enough nearby providers, with the ones they do cover too busy to take new patients in a timely fashion. Clearly this would be especially problematic if appointments with one’s preferred primary care doctor are hard to obtain.

Are today’s narrow network plans actually doing this? Until recently, we had no data to answer this question. But two studies published earlier this year — one focused onMassachusetts, the other on California — provide some insight.