Northwestern Mutual – River » Business Connections Go back to directory. Add to Address Book. Northwestern Mutual – River Northwestern Mutual – River Work 1760 E River Rd Ste 247 Tucson AZ 85718 work Work Phone: (520) 615-5399work Cell Phone: (520) 245-2200cell Work Email: moc.nfmn@retnuh.arbedINTERNET Website: Website Connections Business Directory | Leaflet | Wikimedia 1760 E River Rd Ste 247 Tucson AZ 85718Get Directions