Our main office and lines of business are listed below. Individual staff contact information is also available to assist with any questions.

Main Address, Telephone, and Fax Numbers:

Massachusetts Interlocal Insurance Association

3 Center Plaza, Suite 610,
Boston, MA 02108
Phone: 1-800-882-1498
Fax: (617) 426-9546
Hours of Operation: Monday – Friday, 9:00 AM – 5:00 PM (EST)

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Workers' Compensation Claims Mailing Address:

MIIA Member Services

53 State Street
Boston, MA 02109
Phone: 1-800-799-6442
Fax: (617) 753-9987

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Property and Liability Claims Mailing Address:

MIIA Property and Liability

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

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Health and Dental Subscriber Submission of Claims:

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

Blue Cross Blue Shield of Massachusetts
Claims Department

P.O. Box 9131
North Quincy, MA 02171-9131

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Health and Dental Enrollment and Eligibility:

MIIA Health Benefits Trust

3 Center Plaza, Suite 610,
Boston, MA 02108
Phone: 1-800-374-4405
Fax: (617) 542-6513
Hours of Operation: Monday – Friday, 9:00 AM – 5:00 PM (EST)

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Health and Dental Premium Invoice Remittance Only:

MIIA Health Benefits Trust

Department 520
P.O. Box 4106
Woburn, MA 01888-4106

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Property and Liability Invoice Remittance Only:

MIIA Property and Liability Group, Inc.

Department 530
P.O. Box 4106
Woburn, MA 01888-4106