An NPI Registry lookup can match a U.S. health care provider or organization to a 10-digit National Provider Identifier and show public NPPES fields such as names, addresses, taxonomy, and enumeration status. It does not verify a professional license, board certification, clinical quality, network participation, or current employment at a location.
Search the right NPI entity type
Use the public CMS NPI Registry. Type 1 records are for individual providers; Type 2 records are for organizations such as practices, hospitals, or other covered organizations. Search both when the name on a bill belongs to a clinic but the person who delivered care is an individual clinician.
| Field | What to compare | What it does not establish |
|---|---|---|
| NPI | Exact 10-digit identifier | License or identity by itself |
| Provider name | Legal and other published names | Current employment or ownership |
| Taxonomy | Reported classification and specialization | Board certification or scope under state law |
| Practice address | Location and update date | That appointments are currently offered there |
Match more than the name
Common names and group practices can produce several plausible records. Compare the NPI, entity type, state, postal code, practice location, taxonomy, and last-updated information. A mailing address can differ from a practice address, and an organization can have several service locations or identifiers.
The NPI printed on a claim or bill may belong to the billing organization, rendering clinician, referring provider, or another role in the transaction. Do not replace one with another because the names look related. Keep the document field and NPI together, then search that exact number. If the question is who personally treated the patient, compare the individual Type 1 record with the appointment, clinical document, and state license record rather than relying on a group Type 2 result.
NPPES data can also retain a mailing location or taxonomy that the provider needs to update. Note the record’s last-updated date and compare it with the provider’s own current contact information, but do not silently substitute a commercial directory. When a discrepancy affects billing or care, ask the provider which NPI and location should appear on the transaction and use the official correction path for the record owner.
Check the record in a reproducible order
- Choose an individual or organization search based on the name being checked.
- Search by NPI when it appears on a bill, referral, directory, or claim; otherwise use name plus state or ZIP code.
- Compare the full legal name, entity type, address, taxonomy, and enumeration details.
- Open the state licensing board separately when the decision depends on an active professional license or discipline.
- Save the NPI and access date, then confirm network status directly with the insurer and provider before care when cost matters.
Read taxonomy as reported classification
The CMS NPI overview defines the NPI as a unique identifier used in standard health care transactions. Taxonomy codes classify the provider type or specialization reported in NPPES. They are useful for distinguishing similarly named records, but they are not a substitute for the state board’s scope, license status, or specialty certification.
Use the doctor license lookup guide when the question is whether a physician license is active. The professional license lookup guide explains status, expiration, and published discipline fields across state boards.
What an NPI cannot prove
CMS states on its data dissemination page that the registry is a query-only view of FOIA-disclosable NPPES data. An issued NPI does not ensure or validate that a provider is licensed or credentialed. It also does not prove that an insurer will cover the provider, that the address is accepting patients, or that a person contacting you is the provider shown in the record.
NPI Registry lookup questions
Can I search by provider name instead of NPI?
Yes. Add state, city, or ZIP information and compare several fields because names can match more than one record.
Does an active NPI mean an active medical license?
No. Check the relevant state licensing board separately for license status and public discipline.
Why does a clinic have a different NPI from the clinician?
An organization can have a Type 2 NPI while an individual clinician has a Type 1 NPI. Billing and care records may show both.
CMS and NPPES sources were checked July 21, 2026. Provider records can be updated after publication.