Aetna and ProHealth Physicians Inc. on Monday announced a new accountable care collaboration, which will use technology to better manage the health and medical treatment of a group of patients while trying to reduce medical expenses.

The agreement between the Hartford-based health insurer and the doctors' network is Aetna's first such arrangement in Connecticut. Aetna has accountable-care arrangements in Maine, New Jersey and Westchester County, N.Y., but this is the first in Southern New England.

Health insurers increasingly are using accountable-care organizations, which often include using electronic medical records and clinical coordinators to follow up on patients.

The arrangement starts with ProHealth's 30,000 Medicare patients in Connecticut, and will expand to an additional 23,000 who have Aetna as their health insurer and are patients of ProHealth doctors.

This particular accountable care plan uses Aetna's Healthagen technology to keep track of patients' electronic medical records.