"(Status 400) Npi XXXXXXXXXX has already been taken for this payer"
If you received this error, it doesn't mean that you've done anything wrong on your end. This error usually appears when you've tried to submit an enrollment with this payer before via SimplePractice but for some reason, the first attempt didn't go through. We can easily help you fix this.
1- What payer are you trying to enroll with and keep getting this error message?
2- What NPI number are you getting this error message with?
Once we have this information, we will be able to fix this on our side within one business day. You can contact our support team by clicking here.