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Dr. NPI Search
Guide

NPI number vs. medical license

These two are easy to confuse, but they answer completely different questions. An NPI identifies a provider; a license authorizes them to practice. Only one of them can be checked on this site.

The short answer

An NPI (National Provider Identifier) is a unique 10-digit number issued by the Centers for Medicare & Medicaid Services (CMS) to identify a provider in administrative transactions such as claims. A medical license is issued by a state licensing board and is what legally permits a provider to practice in that state. The NPI identifies; the license authorizes.

NPI number

An identifier

Issued by
CMS (federal)
Purpose
A stable ID for administrative transactions like claims
Public?
Yes — published through NPPES
Changes if status changes?
No — it is permanent
Confirms good standing?
No

Medical license

Authority to practice

Issued by
A state licensing board
Purpose
Legal authority to practice in that state
Public?
Verifiable via the state board's lookup
Changes if status changes?
Yes — can lapse, be suspended, or revoked
Confirms good standing?
Yes — that is its job

Side by side

  • Issued by: NPI — CMS (federal). License — a state board.
  • Purpose: NPI — a stable identifier for transactions. License — legal authority to practice.
  • Public? NPI — yes, via NPPES. License — verifiable via the state board's lookup.
  • Changes when status changes? NPI — no, it is permanent. License — yes, it can lapse, be suspended, or be revoked.
  • Confirms good standing? NPI — no. License lookup — yes, that is its job.

Why this matters

Because an NPI is permanent and administrative, it stays the same even if a provider's license lapses or is disciplined. That is the most common misunderstanding: seeing an NPI record is not evidence that a provider is currently licensed or in good standing. For the full list of what the registry does and does not establish, see what an NPI record shows.

How to verify a license the right way

  1. Identify the provider's profession and the state where they practice.
  2. Go to that state's licensing board for that profession.
  3. Use the board's license-lookup to confirm the license is active and unrestricted.
  4. For board certification, check the relevant certifying body separately.

For a full pre-appointment checklist, see how to verify a provider before an appointment. This site shows public NPI data only — see our disclaimer.

Source: public CMS NPPES records.

Frequently asked questions

Is an NPI number a medical license?
No. An NPI is a national administrative identifier issued by CMS. A medical license is issued by a state licensing board and is what authorizes a provider to practice. They are separate and unrelated.
Can a provider have an NPI but no active license?
Yes. An NPI is permanent and is not removed if a license lapses, is suspended, or is revoked. The presence of an NPI says nothing about current license status — always check the state board.
Where do I verify a license?
With the state licensing board for the relevant profession and state. Each board publishes its own license-lookup tool; that is the authoritative source.