The National Provider Identifier (NPI) is a unique number assigned to health care practitioners (e.g., physicians) and health care organizations (e.g., facilities or group practices). Each health care practitioner (e.g., physician) can obtain an individual NPI number. Health care organizations can obtain multiple NPI numbers to represent different organizational parts. | The National Provider Identifier (NPI) is a unique number assigned to health care practitioners (e.g., physicians) and health care organizations (e.g., facilities or group practices). Each health care practitioner (e.g., physician) can obtain an individual NPI number. Health care organizations can obtain multiple NPI numbers to represent different organizational parts. |