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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) Workers’ 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 12 Gill Street, Suite 1600 Woburn, MA 01801-1728 Phone: 1-800-526-6442 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 Workers’ Compensation Invoice Remittance Only: MIIA Workers’ Compensation Group, Inc. P.O. Box 5795 Boston, MA 02206-5795
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