Senior Dimensions Member Services: 1-800-650-6232; TTY: 1-800-349-3538.  Member Services hours:  From March 2 through November 14, we are open Monday - Friday from 8 am to 8 pm.  Calls on Saturday, Sunday and holidays will be received by our automated phone system (where you can leave a detailed message and a representative will return your call as soon as possible).  From November 15 through March 1, we are open seven days a week from 8 am to 8 pm.