Insurance Billing Address MassHealth (2025) – Full Guide
The correct insurance billing address for MassHealth depends on the type of form you’re submitting and whether you’re filing electronically or by paper. In this updated 2025 guide, you’ll find the official mailing addresses for CMS-1500 and UB-04 claims, how to request a waiver for paper submissions, filing deadlines, appeals process, and internal links to helpful MassHealth billing guides and resources.
Looking for the correct insurance billing address for MassHealth? This up-to-date guide provides everything you need to know to submit CMS-1500 or UB-04 forms, get electronic waivers, and avoid billing errors and denials.
1. Paper Claims Mailing Addresses
1.1 General Claims
All paper CMS-1500 and UB-04 claim forms must be sent to:
MassHealth Customer Service P.O. Box 7 Quincy, MA 02171
Download the official CMS-1500 Billing Guide (PDF) for detailed instructions.
1.2 Enrollment and Demographics
Send provider enrollment forms or demographic updates to:
Attn: Provider Enrollment and Credentialing MassHealth Customer Service P.O. Box 278 Quincy, MA 02171
2. Electronic Claims Submission (Preferred)
MassHealth prefers electronic claim submission using:
- Provider Online Service Center (POSC) – for Direct Data Entry (DDE)
- HIPAA-compliant 837 batch files via approved clearinghouses
For step-by-step form guidance, check out our guide: How to Fill Out CMS-1500 & UB-04 Forms.
3. Requesting a Paper Claims Waiver
If you cannot submit electronically, request a waiver by:
- Email: docmgmtdcf@maximus.com
- Mail:MassHealth Customer Service Center ATTN: Claims P.O. Box 7 Quincy, MA 02171
- Fax: (617) 988-8910
Download the Electronic Claims Waiver Request (PDF).
4. Claim Deadlines, Voids & Appeals
- Initial Filing Deadline: Within 90 days of the date of service.
- Final Deadline: 12 months from the service date (denial error code 853 or 855).
- Appeals: File within 30 days via POSC. Paper appeals allowed only with a waiver.
Appeals for “Final Deadline Exceeded” must be mailed to:
Final Deadline Appeals Board MassHealth 600 Washington Street Boston, MA 02111
5. Frequently Asked Questions
Q1: What goes in Box 33 of CMS-1500?
Use your billing address. For paper claims, you can include:
MassHealth Customer Service P.O. Box 7 Quincy, MA 02171
Q2: Can I fax claims to MassHealth?
No. Claims must be mailed. Fax is only used for waiver forms or specific pharmacy services.
Q3: How long is a waiver valid?
Waivers are valid for 12 months. Renew at least 30 days before it expires.
6. Additional Resources
By using the correct billing address for MassHealth and submitting on time, you’ll reduce denials and speed up your reimbursements.