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Electronic Claims HIPAA File and Provider Online Service Center (POSC) Updates

November 23, 2020

In March 2021, MassHealth will implement minor modifications to the submission requirements related to operating physician, service facility location, and supervising physician information submitted on claims transactions. The changes will impact both 837 batch claims transactions and the Provider Online Service Center (POSC) Direct Data Entry (DDE) claims transactions.

In preparation for these modifications, MassHealth will conduct general information sessions for providers, trading partners, and vendors beginning in late January. Registration will begin earlier that month and can be completed at: once available.

It is highly recommended that trading partners participate in the information sessions in January to understand the upcoming changes. If the changes require your organization to make modifications to the information submitted within your batch or DDE claims transactions, or updates to your operational processes, MassHealth strongly encourages you to identify the changes as quickly as possible. For more information, please visit

If you have questions, please email the MassHealth Customer Service Center at If you are an LTSS provider, please contact LTSS Provider Service Center at (844) 368-5184 or