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Provider Online Service Center (POSC) User ID Maintenance and Validation

January 10, 2022

Each organization must be sure that access to their information on the POSC is accurately maintained to ensure that only those persons that should have access to the organization’s data can view, submit, or receive information on behalf of the organization.

The Primary User within an organization is responsible for managing user access to the organization’s information on the POSC and MassHealth’s connectivity methods (e.g., system to system) and must, at a minimum, do the following:
    • Ensure that a back-up administrator has been assigned to support user access requests in the Primary User’s absence
    • Ensure that each user has been issued their own user ID
    • Terminate user IDs once a staff person has left the organization and once affiliate and vendor relationships and engagements have ended
    • Establish and maintain a quarterly, semi-annual, or annual review and alignment of all user access to safeguard the organization’s MassHealth related information
Please note that MassHealth is in the process of validating access and activity for user IDs that have not logged in to the POSC through the Virtual Gateway since prior to 8/31/2020. User IDs that have been inactive up until 3/31/2020 will be terminated. User IDs that have been inactive between 4/1/2020 and 8/31/2020 may be terminated. Those impacted users will be notified.
If you have questions, please contact the MassHealth Customer Service Center at or (800) 841-2900. If you are an LTSS provider, please contact the LTSS Provider Service Center at (844) 368-5184 or