Healthcare Resource
NPI Number Lookup: How to Find and Verify Any Healthcare Provider
In brief
Every healthcare provider in the U.S. has a National Provider Identifier. Here is how to look up NPI numbers, what the data tells you, and how recruiters use NPI data for sourcing.
In this article
A National Provider Identifier (NPI) is a unique 10-digit number assigned to every healthcare provider in the United States by the Centers for Medicare & Medicaid Services (CMS). Whether you are verifying a physician's credentials, researching a nurse practitioner's practice, or building a recruiting pipeline, the NPI number is your starting point.
What Is an NPI Number?
The NPI was created by HIPAA in 1996 and became mandatory for all healthcare transactions in 2007. Every provider who bills Medicare, Medicaid, or private insurance must have one. There are two types:
- Type 1 (Individual), assigned to individual providers (physicians, nurses, therapists, dentists, etc.)
- Type 2 (Organization), assigned to healthcare organizations (hospitals, clinics, group practices)
An NPI number never changes. Once assigned, it stays with the provider for their entire career, regardless of where they practice or what specialty they work in.
How to Look Up an NPI Number
There are several ways to search for NPI numbers:
1. NPPES NPI Registry (Official)
The official source is the NPPES NPI Registry at npiregistry.cms.hhs.gov. You can search by provider name, NPI number, location, specialty (taxonomy), or organization name. Results include the provider's address, phone number, specialty taxonomy codes, and practice location.
2. State Licensing Boards
Most state medical boards and nursing boards allow you to search by license number and will display the associated NPI if available.
What NPI Data Tells You
| Field | What It Tells You |
|---|---|
| NPI Number | Unique provider identifier (never changes) |
| Provider Name | Legal name registered with CMS |
| Taxonomy Code | Medical specialty classification |
| Practice Address | Where the provider practices |
| Mailing Address | Where official correspondence goes |
| Phone Number | Practice or office phone |
| Enumeration Date | When the NPI was first assigned |
| Last Updated | Most recent profile update |
| Sole Proprietor | Whether provider bills under their own name |
How Recruiters Use NPI Data
NPI data is a goldmine for healthcare recruiters because it is free, complete, and regularly updated:
- Sourcing, search by taxonomy (specialty) and state to build candidate lists
- Credentialing, verify a candidate's NPI before starting the credentialing process
- Contact discovery, practice addresses and phone numbers are publicly listed
- Specialty verification, taxonomy codes confirm what the provider actually practices
- Deduplication, NPI is unique per provider, making it the best dedup key
NPI Taxonomy Codes Explained
Each NPI includes one or more taxonomy codes that classify the provider's specialty. Common codes:
- 207Q00000X, Family Medicine
- 207R00000X, Internal Medicine
- 2084P0800X, Psychiatry
- 367500000X, Nurse Anesthetist (CRNA)
- 363L00000X, Nurse Practitioner
- 163W00000X, Registered Nurse
- 225100000X, Physical Therapist
Related reading: Healthcare Credentialing: A Complete Guide for Recruiters, Credentialing Timeline for New Hires: What to Expect in 2026.
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