Customer Care
Phone: 888-433-3582
Monday - Friday: 8 am to 8 pm ET
Email: libertyteam@deltadentalma.com
Delta Dental of Massachusetts
Attn: Liberty Mutual Unit
PO Box 75688
Seattle, WA 98175
Account-Specific Information
Liberty Mutual
Claims
Phone: 888-433-3582Delta Dental of Massachusetts
Attn: Liberty Mutual Unit
PO Box 75688
Seattle, WA 98175
Massachusetts Public Employees Fund
Customer Care
Phone: 800-553-6277
Monday - Friday: 8:30 am to 4:30 pm ET
Email: mpeunit@deltadentalma.com
Delta Dental of Massachusetts
Attn: MPE Unit
PO Box 75688
Seattle, WA 98175
Claims
Phone: 800-553-6277Delta Dental of Massachusetts
Attn: MPE Unit
PO Box 75688
Seattle, WA 98175
Mass General Brigham
Customer Care
Phone: 844-876-7921
Monday - Friday: 8:00 am to 8:00 pm ET
Email: customer.care@deltadentalma.com
Attn: Mass General
PO Box 75688
Seattle, WA 98175
RTX Corporation
Customer Care
Phone: 877-335-8227
Monday - Friday: 8:00 am to 8:00 pm ET
Email: raytheonteam@deltadentalma.com
Attn: RTX Corporation
PO Box 75688
Seattle, WA 98175
For general contact information, visit our Contact Information page. To email Delta Dental of Massachusetts directly, use our Contact Us Form.
