NPI Number Lookup: How to Find and Verify Any Healthcare Provider

Ava Health Team||7 min read

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. Ava Health Provider Directory

The Ava Health Provider Directory includes NPI data for over 700,000 healthcare providers, organized by state, city, and specialty. Each provider profile displays their NPI number alongside their credentials, location, and specialty information.

3. 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

FieldWhat It Tells You
NPI NumberUnique provider identifier (never changes)
Provider NameLegal name registered with CMS
Taxonomy CodeMedical specialty classification
Practice AddressWhere the provider practices
Mailing AddressWhere official correspondence goes
Phone NumberPractice or office phone
Enumeration DateWhen the NPI was first assigned
Last UpdatedMost recent profile update
Sole ProprietorWhether provider bills under their own name

How Recruiters Use NPI Data

NPI data is a goldmine for healthcare recruiters because it is free, comprehensive, 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

Search healthcare providers by NPI at providers.avahealth.co or build your recruiting pipeline at app.avahealth.co.

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