How to Find a Doctor's NPI Number (Free)

You can find any US doctor's NPI number free in seconds. Use the free NPI lookup tool at EmailAddress.ai -- enter the provider's name, state, and specialty and results come back instantly. NPI numbers are public under HIPAA, so no login or payment is required.

What is an NPI number and why does it matter?

An NPI (National Provider Identifier) is a 10-digit number assigned by the Centers for Medicare and Medicaid Services (CMS) to every licensed US healthcare provider. It was created by HIPAA to standardize how providers are identified in insurance transactions, referrals, and billing.

NPI numbers are permanent. A physician keeps the same NPI through name changes, moves, practice changes, and retirements. That permanence makes NPI the most reliable anchor for identifying a specific provider across datasets.

There are two types:

• Type 1 NPI -- assigned to individual providers: physicians, nurses, dentists, therapists, pharmacists
• Type 2 NPI -- assigned to organizations: hospitals, group practices, labs, pharmacies, insurers

How do you find a doctor's NPI number for free?

There are two main options, both free:

1. Go to the NPI lookup tool. No login or account needed. The tool is free.
2. Enter the provider's name, state, and specialty. All three fields narrow results quickly. For common names, adding credential type (MD, DO, NP) reduces noise further.
3. Review results. Each result shows the NPI number, credential, taxonomy code, practice address, and enumeration date.
4. Copy the NPI. Click any result to expand the full record. NPI numbers are 10 digits and permanent -- the same number follows the provider through practice changes and relocations.

What information does an NPI record include?

Every public NPI record contains:

Field	Example
NPI number	1234567890
Provider name	Dr. Sarah Chen, MD
Credential	MD, DO, NP, PA, DDS, PharmD
Taxonomy code	207Q00000X (Family Medicine)
Practice address	Street, city, state, zip
Mailing address	May differ from practice
Phone	Practice phone number
Enumeration date	When the NPI was assigned
Last update	When the record was last changed

NPI records do not include email addresses. Email contact information is maintained separately through commercial physician databases that overlay the NPI registry with verified contact data.

Can you search NPI numbers by specialty or state?

Yes. The NPPES registry and third-party tools support filtering by taxonomy code (specialty), state, and provider type. You can pull all orthopedic surgeons in Florida, all nurse practitioners in Illinois, or all psychiatrists in a specific city.

Taxonomy codes are standardized by the Health Care Provider Taxonomy Code Set maintained by NUCC. There are over 900 taxonomy codes covering every clinical specialty and subspecialty. The NPI lookup tool lets you search by specialty name rather than memorizing taxonomy codes, which is faster for most searches.

Who needs to look up NPI numbers?

NPI lookups come up in several contexts:

• Medical billing and insurance -- NPI is required on every insurance claim. Billers verify NPI before submitting claims.
• Referral verification -- Providers confirm a referring physician's NPI before processing referrals.
• Credentialing -- Hospitals and payers verify NPI as part of provider credentialing.
• Pharma and device sales -- Sales reps and marketers use NPI to identify target physicians by specialty and geography.
• Healthcare data enrichment -- Organizations match their CRM records to NPI data to verify provider identity and add specialty information.

How do NPI numbers connect to physician contact data?

NPI is the anchor identifier for physician data, but it does not include email. To reach a physician by email, you need a dataset that maps NPI numbers to verified work email addresses. EmailAddress.ai's physician email database covers 1,993,934 US physicians, each matched to their CMS NPI record, with email verification applied at the individual address level.

Because NPI is permanent, NPI-matched data ages better than contact records built on name or address alone. If a physician changes practices, the NPI still identifies them, making it easier to find updated contact information.