NPI Number Lookup

Free National NPI Number Registry

Frequently Asked Questions

Q: Why is my NPI being shared by NPINumberLookup?


A: To simplify finding and providing NPI numbers. By HIPAA law, "Each covered health care provider [must] disclose its NPI, when requested, to any entity that needs the NPI to identify that health care provider in a standard transaction."

Q: Am I required to obtain and make available my NPI when requested?


A: Most likely, yes. NPIs and associated data are in the public domain

Q: Is it safe?


A: Yes, it's the same data provided by the US government, just made a bit easier to search.

Q: How often is the data updated?


A: Data is refreshed weekly, as provided by NPPES. Real-time data searches are available here.

Q: Why is this site not password protected?


A: NPIs and associated infomation are in the public domain.

Q: How do you ensure that NPIs in your database are valid?


A: CMS follows a version of the ISO standard Luhn algorithm. We verify all submissions at the time of entry using this algorithm.

Q: I've heard that Medicare is has an NPI Registry. If so, why are you doing this?


A: CMS has a publicly searchable NPI registry, but it is not as quick and easy as this registry. Also, lookups on this registry work well on most mobile devices.

The information on www.npinumberlookup.org is provided As Is in accordance with the Freedom of Information Act (FOIA), the NPPES Data Dissemination Notice, and the e-FOIA amendments. No warranties are made regarding the reliability, accuracy, or completeness of the data presented. Individuals seeking official National Provider Identifier (NPI) records or healthcare provider information may obtain such data directly from the U.S. Department of Health and Human Services under FOIA provisions. For specific inquiries, the NPI Enumerator may be contacted at (800) 465-3203 or by mail at P.O. Box 6059, Fargo, ND 58108.