A personal health account technology company has signed a major client.

Health Net Inc., Woodland Hills, Calif., has agreed to use a Web-based system from CareGain Inc., East Windsor, N.J., to run its personal health account program, according to CareGain.

Health Net will start using the system in its Northeast region, which includes Connecticut, New Jersey and New York.

CareGain is now a unit of Fiserv Inc., Brookfield, Wis.