Short, direct answers to the questions people ask about NPI numbers and Medicare enrollment.
An NPI is the 10-digit National Provider Identifier behind every US healthcare claim. What it is, who needs one, and how to look one up free.
Type 1 NPIs belong to people, Type 2 NPIs belong to organizations. How each is used on claims, why many clinicians have both, and how to check any number.
Three identifiers, three jobs: the NPI says who provided care, the TIN says who gets paid, the DEA number covers controlled substances. Sort them out here.
An active NPI does not mean active Medicare enrollment. How to verify a provider's PECOS status, revalidation date, and opt-out standing before you bill or refer.