Addresses and Phone Numbers

MIIA Addresses:

Main Address, Telephone, & Fax Numbers:

Massachusetts Interlocal Insurance Association
One Winthrop Square, 2nd Floor
Boston, MA 02110
Inside Massachusetts: 1-800-882-1498
Nation wide: 1-800-374-4405
Fax: (617) 426-9546
Hours of Operation: Monday – Friday, 9:00 AM – 5:00 PM (EST)

Worker’s Compensation Claims Mailing Address:

MIIA Member Services
One Federal Street
Boston, MA 02110
Phone: 1-800-799-6442
Fax: (617)753-9987

Property, Casualty, & Liability Claims Mailing Address:

MIIA Property & Casualty
15 Cabot Road
Woburn, MA 01801-1003
Phone: 1-800-222-5963
Fax: (781)376-9907

Health & Dental Subscriber Submission of Claims:

*Blue Cross Blue Shield of Massachusetts
Claims Department
P.O. Box 9131
North Quincy, MA 02171-9131

*Please note that in most cases, providers will submit your medical and dental claims for you electronically.

Health & Dental Enrollment & Eligibility:

MIIA Health Benefits Trust
One Winthrop Square, 2nd Floor
Boston, MA 02110
Phone: 1-800-374-4405
Fax: (617) 542-6513
Hours of Operation: Monday – Friday, 9:00 AM – 5:00 PM (EST)

Health & Dental Premium Invoice Remittance Only:

MIIA Health Benefits Trust
P.O. Box 5329
Boston, MA 02206-5329

Property & Casualty Invoice Remittance Only:

MIIA Property & Casualty Group, Inc.
P.O. Box 5092
Boston, MA 02206-5092

Worker’s Compensation Invoice Remittance Only:

MIIA Worker’s Compensation Group, Inc.
P.O. Box 5795
Boston, MA 02206-5795

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