The suspension will start after Bell is reinstated by the doctors who administer his care under the joint Substance Abuse and Behavioural Health program.
Bell recently pleaded no contest in California to charges of driving under the influence of alcohol and hit-and-run.
He'll serve six months in jail after the season.
In announcing the suspension, Bettman said that playing in the NHL is a privilege that comes with a responsibility for exemplary
conduct off the ice.