Guidelines for Contacting Mass HIway Participants

These guidelines for using the HIway Directory and communication between participants was developed in collaboration with the Mass HIway team, to help optimize the collaboration between existing and prospective HIway participants.

Healthcare Providers

We appreciate if healthcare providers follow the instructions below to contact other participants listed in the directory:

  • Use the HIway Directory to find out if your current trading partners are connected to the HIway, and/or to search for potential target participants you would like to partner with via the HIway in the future.
  • The listed participants may or may not be ready to exchange health information with new trading partners. If you send a HIway message to a participant who is not ready, the recipient may not be ready to receive what comes in yet.
  • ​​HIway participants should therefore first contact their trading partner to confirm that the organization is ready to receive a message or document before sending any messages over the Mass HIway.
  • If you are a Mass HIway participant that would like to receive assistance in brokering a discussion with your trading partner, or are not yet a Mass HIway participant, contact the Mass HIway Account Managers.

​To support the process, we recommend that participants develop use cases for the intended HIway exchange. This will facilitate the specification and implementation. The HIE Toolkit explains the use case process.

For more information, contact the Mass HIway team at or call 1 855 MA HIway (624-4929):
Participants, select option 2 for user support. Not a Participant yet? Select option 1 for enrollment help.


If you are a patient, you can use the HIway Directory to verify whether your healthcare organization has adopted the Mass HIway Health Information Exchange to transform healthcare delivery.

To learn more about the Mass HIway, visit: