What is a payer enrollment, and do I need one for every payer?

Before an insurance company will trade information with you electronically, it has to know who you are. That introduction is called an enrollment.

An enrollment introduces one provider, by their NPI, to one payer, for one kind of transaction.

Yes, you need one per payer. Each payer is its own door, enrolled on its own. And within a payer, each kind of transaction is its own separate permission:

• Sending claims is one door.
• Checking a patient’s eligibility is another.
• Receiving the payer’s payment reports is another still.

Payers differ, and this is where money hides. For one payer, sending claims may say no enrollment needed, and those claims flow freely. But receive payment details for the same payer may still need a key. That payer will pay you and never send you the explanation until you enroll for remittances.

That is the sneaky one. You get the money, but you never see the breakdown, so you cannot post it properly or tell a write-off from an underpayment.

Every enrollment for every group also lives together on the Payer enrollments page, so one glance tells you which doors are open and which still need work. See What do the enrollment statuses mean?.