Helpful Links
a. CAQH: https://proview.caqh.org/PR/Registration
b. NPI: https://nppes.cms.hhs.gov
d. USPS PO Box: https://www.usps.com/manage/po-boxes.htm
e. UPS PO Box: https://www.theupsstore.com/mailboxes/business-mailboxes
f. W-9 Form: https://www.irs.gov/pub/irs-pdf/fw9.pdf