![](https://blogs.sas.com/content/sasdummy/files/2012/11/validnpi.png)
Using a SAS function to validate a National Provider ID (NPI) value
We are careening towards the holiday season, and this year more than ever before it's going to mean one thing: Online Shopping. As you enter your credit card number over and over to complete your many purchases, you might occasionally transpose or mistype your account number. Does it surprise you