Electronic Data Interchange (EDI) Vendor List

The MassHealth EDI Vendor List below provides the names, phone numbers, transaction types, and services of vendors that can successfully submit electronic Standard HIPAA transactions to MassHealth.

MassHealth works with many providers who use vendors to support their electronic data interchange (EDI).  Any provider is permitted to use the EDI vendor of their choice as long as they can meet MassHealth’s technical requirements. Any EDI vendor who can successfully submit standard HIPAA transactions to MassHealth on behalf of any provider (including managed care entity (MCE) network-only providers) will be added to the EDI Vendor List. MassHealth does not vet, endorse, or evaluate any of the vendors on the EDI Vendor List beyond the technical requirements for submission of standard HIPAA transactions.

If you are a vendor (billing or software) who would like to provide EDI services to a MassHealth provider, and would like to appear on this list, you can contact the MassHealth Electronic Data Interchange (EDI) Unit by email at [e-mail].

For questions about Dental transactions, please call 1-866-616-2699  or visit the MassHealth Dental Program webpage for more information.

Vendor Information

The EDI Vendor List indicates which standard transaction types each EDI vendor supports.  The transaction types included are:

• Eligibility, Coverage, or Benefit Inquiry and Response Transactions
  • 270 – used by a provider to inquire about a member’s eligibility, coverage, or benefits under a health plan 
  • 271 – used by a health plan (payer)  to respond to a 270 inquiry with eligibility and benefit information
• Health Care Claims and Payment/Remittance Advice Transactions
  • 837I – used by institutional providers (e.g., hospitals) to submit claims
  • 837P – used by professional providers (e.g., physicians) to submit claims
  • 835 – used by payers to provide payment information and remittance advice to providers
• Health Care Claim Status Request and Response Transactions
  • 276 – used by a provider to inquire about the status of a previously submitted claim 
  • 277 – used by a payer in response to a 276 transaction, reporting the current status or final disposition of the claim (e.g., received, pending, denied, or paid)

Additionally, the list indicates other services that vendors may offer, such as:

• Coordination of Benefit (COB) Capability – supports the submission and processing of claims when a member has coverage through more than one health plan, ensuring payments are accurately coordinated among payers 
• Void/Replace – allows providers to void or replace previously submitted claims to correct errors or update information
• Provider Enrollment Assistance – helps providers complete and submit the forms or applications required to enroll as a MassHealth provider
• Billing Intermediary – serves as a secure electronic connection between providers and MassHealth, transmitting, validating, and formatting claims and other EDI transactions
• Software Vendor – develops or supplies billing or practice management software that enables providers to create, submit, and track electronic claims and related transactions 
• Minimum Data Set (MDS) – supports submission of federally required assessment data for nursing facility residents to MassHealth in the correct electronic format

Please note: The information in the EDI Vendor List may not include a complete description of the services and transactions offered, and providers should contact EDI vendors directly to verify the full list of options.  Also, you can scroll either horizontally or vertically to see more information in the grid.

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Last updated:	September 4, 2026