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 IS_BCT_Vendor@hap.org. 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 ancillary_providers@hap.org.
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