Please note we will be performing maintenance on the site on Saturday, June 12th from 3:00 AM to 10:00 PM. Login and access to online portals will be unavailable during this time. We apologize for any inconvenience.
Providers: authorizations can be submitted after 10:00 PM. If it’s an emergency, call (313) 664 8833, option 3.

For physicians only: how do I change my TIN (tax identification number) or remittance number with HAP?

To change your TIN or remittance address, please fax a completed and signed W-9 to (248) 443-7761 or email the W-9 to [email protected]. Please allow 10 business days to process the change before submitting claims. You will not be notified once the change has been processed.

To change, update or add an NPI number, complete the billing change form and submit the form to ancillary email box [email protected].

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