Limited network health insurance plans, which are similar to certain HMOs, likely will play a prominent role in health insurance exchanges created under the Affordable Care Act. John Weis -- president of Quest Analytics -- said insurers "can minimize their risk by creating narrow networks" that would be less attractive to individuals with health problems and more desirable to younger and healthier people. Insurers say that more-limited networks could provide higher quality and more efficient care, which could lead to reduced spending.