What is a TPA ID and where can I find it?

The TPA ID is your unique, 8-digit system identification number in MiUI. The TPA ID will be a brand-new number in MiUI. TPAs that have an existing account in MiWAM will be assigned a MiUI TPA ID at Go Live on February 23 and can log into MiUI to see their TPA ID in the top right corner of their Home page. New TPAs will register in MiUI and will receive their MiUI TPA ID after registration.

How will the Two System Transition Period impact TPA IDs?

TPAs will need to manage two TPA IDs during the Two System Transition Period (the period of time in between MiUI Go Live for Tax (Feb. 23, 2026) and Go Live for Benefits (summer 2026) when MiWAM is still active for benefits functions).

Will my clients (employers) need to know my TPA ID?

TPAs will need to share their TPA ID with employers in order to associate with them in MiUI. MiUI is an employer-driven system, which means that employers will add TPAs to their account using the TPA ID that the TPA provides to them. This ID enables employers to search for and add TPAs in MiUI. For more information on TPA assignment and association in MiUI, refer to the TPA Assignment & Association quick reference guide.

TPA IDs in MiUI

What is a TPA ID and where can I find it?

The TPA ID is your unique, 8-digit system identification number in MiUI. The TPA ID will be a brand-new number in MiUI. TPAs that have an existing account in MiWAM will be assigned a MiUI TPA ID at Go Live on February 23 and can log into MiUI to see their TPA ID in the top right corner of their Home page. New TPAs will register in MiUI and will receive their MiUI TPA ID after registration.
How will the Two System Transition Period impact TPA IDs?

TPAs will need to manage two TPA IDs during the Two System Transition Period (the period of time in between MiUI Go Live for Tax (Feb. 23, 2026) and Go Live for Benefits (summer 2026) when MiWAM is still active for benefits functions).
Will my clients (employers) need to know my TPA ID?

TPAs will need to share their TPA ID with employers in order to associate with them in MiUI. MiUI is an employer-driven system, which means that employers will add TPAs to their account using the TPA ID that the TPA provides to them. This ID enables employers to search for and add TPAs in MiUI.

For more information on TPA assignment and association in MiUI, refer to the TPA Assignment & Association quick reference guide.

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TPA IDs in MiUI