Lappan Insurance Agency, Inc. - Directory Click on any of the categories below to find an expert! Don’t see your business in our Directory? Read the rules provided below and submit your business in the form provided. We process submissions between 9AM – 11AM Monday through Friday. Go back to directory. Add to Address Book. Lappan Insurance Agency, Inc. Lappan Insurance Agency, Inc. Work Phone: (989) 354-3185work Work Fax: (989) 354-2364workfax Website: https://lappanagency.com/ Updated 1 year ago.