Payer Rejection: Invalid Info - Entity's NPI Usage
A6 ACK/REJECT INVAL INFO - ENTITYS NATIONAL PROVIDER IDENTIFIER (NPI). USAGE- THIS CODE REQUIRES USE OF AN ENTITY CODE
This is a common error from Medicare, but other Payers may use it as well.
- The payer is indicating that either the NPI that you entered for the billing provider or rendering provider is not an NPI that they have on file.