Aetna said around 30% of its network's primary-care physicians are already eligible for its new bonuses, and the number is growing rapidly.

WSJ: An Rx? Pay More to Family Doctors

But WellPoint, with its network of about 100, 000 primary-care doctors, could have a much broader influence.

WSJ: An Rx? Pay More to Family Doctors

Thanks to this landmark legislation, women joining new health plans have the ability to choose their own doctor from any primary care provider, OB-GYN, or pediatrician in their health plan's network without a referral.

WHITEHOUSE: The White House

The developers of the network, based at the University of Manchester in the UK, see its primary use in care homes or hospital wards, to raise an immediate alarm in the case of a fall.

BBC: 'Magic carpet' can detect or even predict a fall