In the midst of all the turmoil in health care these days, one thing is becoming clear: No matter what kind of health plan consumers choose, they will find fewer doctors and hospitals in their network — or pay much more for the privilege of going to any provider they want.

These so-called narrow networks, featuring limited groups of providers, have made a big entrance on the newly created state insurance exchanges, where they are a common feature in many of the plans. While the sizes of the networks vary considerably, many plans now exclude at least some large hospitals or doctors’ groups. Smaller networks are also becoming more common in health care coverage offered by employers and in private Medicare Advantage plans.

Insurers, ranging from national behemoths like WellPoint, UnitedHealth and Aetna to much smaller local carriers, are fully embracing the idea, saying narrower networks are essential to controlling costs and managing care. Major players contend they can avoid the uproar that crippled a similar push in the 1990s.