Definition · Provider identifiers and enrollment
A Type 1 NPI is the National Provider Identifier for an individual person, such as a physician, nurse, or therapist. It stays with that person when they change jobs. A Type 2 NPI is for an organization. Both are 10 digits, and the tenth digit is a check digit. The lookup is at /npi-lookup.
In the NPPES file, entity type 1 is the individual. The public record can list a credential and one or more taxonomy codes. This site does not publish NUCC definition paragraphs.
Source: CMS, What You Need to Know About NPIs. The NPPES monthly file dated October 12, 2026 uses entity type code 1 for individuals.
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