What Is an NPI? How to Check a Provider's Identity

An NPI is a 10-digit National Provider Identifier used in standard healthcare transactions. It helps distinguish a person or organization in records. It does not certify a provider's license, credentials or quality of care.

Search by name or exact NPI, then use this checklist to confirm that you have the right record.

Check the record in three steps

  1. Match the identifier. Copy the 10-digit NPI from the provider profile and look it up in the official NPPES NPI Registry. If you only have a name, compare the available matches before choosing one.
  2. Check the entity and context. Compare the full name, individual or organization type, practice location and listed taxonomy. The taxonomy describes the registered provider classification; it is not independent proof of a qualification.
  3. Resolve uncertainty before using the data. If names or addresses differ, check the record's update information and ask the practice to confirm its identifier. Do not combine two people's payments or procedures because their names look similar.

The digits themselves do not encode a provider's state or specialty. CMS explains the identifier in its NPI standard overview.

Type 1 and Type 2 identify different things

  • Type 1: an individual healthcare provider. An individual generally retains the same NPI when changing location or specialty.
  • Type 2: an organization, such as a group practice or hospital. An organization can have separately enumerated subparts, so one brand or health system need not correspond to one NPI.

A doctor's individual identifier and the identifier of the practice billing for services can therefore differ. Check which entity the source record describes. See CMS guidance on organization subparts and NPI basics.

What an NPI cannot establish

A current license or credential. CMS explicitly states that issuing an NPI does not validate licensure or credentialing. For license status, use the relevant state licensing board and match the person and license number. CMS NPI data notice.

Years of clinical experience. An enumeration date is the date the identifier was assigned, not the date someone began practicing.

Availability or insurance acceptance. A registry record does not tell you whether the practice is accepting patients or whether a particular appointment is covered by your plan. Confirm those details with the practice and insurer.

If a profile looks wrong

Keep the NPI and the source link, and describe the field that differs. For an issue on DocTransparency, use report a profile error. Our presentation and the underlying registry are separate: a correction here does not update NPPES.

DocTransparency's provider URLs include the NPI to help identify the underlying record. Data sources and publication dates still matter; an identifier alone does not make every linked field current or every dataset match correct. See our source and matching methodology.

Next step: once identity is clear, check reported industry payments or understand the limits of Medicare procedure counts.

Data Disclaimer — Data sourced from the Centers for Medicare & Medicaid Services (CMS): National Plan and Provider Enumeration System (NPPES), Open Payments program, Medicare Provider Utilization and Payment Data, and Provider Enrollment & Certification data (PECOS). Published under the Freedom of Information Act (FOIA). This website is not affiliated with, endorsed by, or authorized by CMS, HHS, or the U.S. Government. Data may contain errors as reported to CMS by providers and reporting entities. Industry payment disclosure alone establishes neither wrongdoing nor legality. Medicare data reflects only patients aged 65+ or those with qualifying disabilities. For corrections, contact CMS directly. This information does not constitute medical advice and should not be used as the sole basis for choosing a healthcare provider. Procedure descriptions use plain language and do not reference CPT® codes, which are copyrighted by the American Medical Association. Full methodology → · Report a data error → · Privacy policy →