MiddleOak Mutual

To Report a Claim:

During normal business hours, call your W.T. Phelan branch.
After hours, please call 866.236.6306

Personal Lines Billing Information:

Phone: 800.662.6243

Mail payments to:

Middleoak Mutual Insurance Company (Holyoke & Middlesex Mutual)  
P.O. Box 2006
Salem, MA 01970 

Commercial Lines Billing Information:

Phone: 800.662.6243

Mail payments to:

Middleoak Mutual Insurance Company (Holyoke & Middlesex Mutual
P.O. Box 981035 
Boston, MA 02298