The NPI information in this site is public information provided by the National Plan and Provider Enumeration System (NPPES). If you want to officially update your NPI data please contact the NPPES directly: By phone: 1-800-465-3203 (NPI Toll-Free) 1-800-692-2326 (NPI TTY) By e-mail: customerservice@npienumerator.com By mail at: NPI Enumerator PO Box 6059 Fargo, ND 58108-6059