NPI Number Validator
Checks the arithmetic of any 10-digit National Provider Identifier, and — as a completely separate question — whether it matches a real record in NPISignal's imported NPPES dataset.
These are two different questions
A mathematically valid NPI does not prove a provider record exists. Neither result below establishes that anyone is licensed, credentialed, or currently practicing — NPI enumeration is an administrative identifier, not a licensing determination.
Enter an NPI to begin
Try a 10-digit number above. You'll see the check-digit arithmetic and a registry match immediately.