NPI guides
Short, sourced answers to the questions people actually have about NPI numbers.
What Is an NPI Number?The 10-digit ID every U.S. health care provider uses on claims.How to Find a Provider's NPI NumberSearch by name, state or number in the official registry.Type 1 vs Type 2 NPI: What's the Difference?Individuals get Type 1. Organizations get Type 2.NPI vs DEA vs State License NumberThree different numbers for three different jobs.How to Get an NPI NumberIt's free, and you apply online with CMS.How to Update Your NPPES RecordChanges must be reported within 30 days.Is an NPI Number Public Information?Yes. The registry is public by design.How the NPI Check Digit WorksThe last digit catches typos. Here's the math.Can You Look Up an NPI by Tax ID (EIN or TIN)?Not directly. Here is why, and what works instead.NPI Taxonomy Codes ExplainedThe 10-character codes that describe a provider's specialty.