Refreshed weekly · sourced field by field

Find the provider, open the record, take the file.

NPI Mark is provider data you can act on the same afternoon: search every US healthcare provider by name, NPI, specialty, state or ZIP, open a record to its verified work email and practice phone, and export it in the shape your CRM already imports.

Search/searchlive
Specialty · Internal MedicineWork email on file · yes+ state, city, ZIP, radius, NPI
Providers matching Internal Medicine with a work email on file, read from the API when this page was rendered
ProviderSpecialtyLocationWork email
4C MEDICAL GROUP PLC1558654384Multi-Specialty Clinic/CenterSCOTTSDALE, AZon file
A & F SERVICES MD PA1003058934Rheumatology PhysicianLAKE JACKSON, TXon file
A. SATTAR, MUHAMMAD AIJAZMD1760465553Internal Medicine PhysicianDALLAS, TXtrusted
AAA AMERICAN HEALTHCARE LLC1285979757Mental Health CounselorIDAHO FALLS, IDon file
4 of 321,780 matching · page 1Open this search
Coverage by specialty/datalive
  • Nurse Practitioner586,843
  • Internal Medicine439,566
  • Dentist389,426
  • Physical Therapist337,168
Counts refreshed Oct 5, 2026.What is in a record
9,469,440providers on file
4,892,902with a verified work email
9,467,507with a practice phone
8specialties counted here

Every figure and every row above was read from the API when this page was rendered. A count that could not be read is left out rather than shown as nought.

Search

Nine filters, and a count before you commit to anything.

A list is only useful if you can tell how big it is before you buy it. Every filter narrows the count in place, so the number you see is the number the export will hold. The specialty list the form offers runs to 41 classifications, and radius search takes a ZIP and a distance rather than making you guess at city spellings.

  • Name, NPI, organisation, or all three at once
  • State, city, ZIP and miles from a ZIP
  • Individual or organisation, active or not
  • Only the records that carry a work email

Run that search yourself

Search/searchlive
Specialty · Internal MedicineWork email on file · yes+ state, city, ZIP, radius, NPI
Providers matching Internal Medicine with a work email on file, read from the API when this page was rendered
ProviderSpecialtyLocationWork email
4C MEDICAL GROUP PLC1558654384Multi-Specialty Clinic/CenterSCOTTSDALE, AZon file
A & F SERVICES MD PA1003058934Rheumatology PhysicianLAKE JACKSON, TXon file
A. SATTAR, MUHAMMAD AIJAZMD1760465553Internal Medicine PhysicianDALLAS, TXtrusted
AAA AMERICAN HEALTHCARE LLC1285979757Mental Health CounselorIDAHO FALLS, IDon file
AADAM, ABDUL AZIZM.D.1013038744Gastroenterology PhysicianCHICAGO, ILtrusted
AAGAARD, JENS PHILIP VILHELMM.D.1679823991Clinical Cardiac Electrophysiology PhysicianPARK RIDGE, ILtrusted
6 of 321,780 matching · page 1Open this search
The record

A work email with a tier on it, not a guess with a percentage.

Opening a provider gives you the address we hold and the tier we hold it at - trusted, or probable, said plainly. Practice phone comes with it. Home address and mobile are a different product: they are agreed under a contract, with the Do Not Call flag shown as we hold it and as unknown when it is unknown, and they are never opened from a web page.

  • Verified work email, with its trust tier
  • Practice phone as filed
  • One reveal per provider per month, then free
  • Home address and mobile: talk to us first

See what a reveal costs

Provider record/npi/1558654384live

4C MEDICAL GROUP PLC

Multi-Specialty Clinic/Center · SCOTTSDALE, AZ

NPI 1558654384

Included on every plan

  • taylore@4cmedicalgroup.comwork emaildoubtful
  • 4804553000practice phone

On a contracted plan, agreed with us first

  • home addresscontract only
  • cell phonecontract onlyDo Not Call status unknown

Where a mobile carries a Do Not Call flag we show the flag when the number is opened, and we show it as unknown when it is unknown. Check the live registry before you call; calling rules are yours to keep.

Opening a provider uses one reveal. Coming back to them this month is free.What a reveal costs
Try it on a real record

Type a surname. That is the index answering, not a screenshot.

Every field below is the one the API returned for that NPI a moment ago, with the date it was last checked. The two fields the product is sold on are stated as facts about the row rather than shown: whether a verified work email exists, and that home contact is contracted and never self-serve.

The public record for 1114572344

NPI
1114572344
Record type
Organization
Status
Active
Name
0-Hassle Personal Care Services Llc
Primary specialty
Personal Care Attendant · 3747P1801X
Practice location
Houston, TX 77026
Practice phone
2818887542
Affiliation
0-Hassle Personal Care Services Llc
Last checked
Jun 12, 2024
Verified work email
None on file for this NPI
Home address & cell
Matched, contracted, never sold self-serve. A released cell number carries the file’s Do Not Call state with it — and that state reads unknown whenever the file holds no flag for the number, which is not the same as safe to call.

What every field means

Export

The file loads without a mapping screen.

Four of the eight column sets are written for a named importer, with that importer’s own header spellings, so the file goes straight in. The other four are ours, for when the destination is a spreadsheet or your own pipeline. Five formats, including a real .xlsx rather than a CSV with a different extension.

  • Salesforce Lead, HubSpot Contact, Pipedrive Person, Zoho Lead
  • CSV, TSV, pipe-delimited, .xlsx, JSON
  • Names in parts, because the register files them that way
  • The row count priced before the button, not after

Browse the published lists

Export/app/exportslive

Columns

Ours

  • Identity and practice
  • Identity only
  • Identity, practice and work email
  • Name in parts
  • Name in parts, work email and practice
  • Identity, practice and what they do

Ready for a CRM

  • Salesforce Lead
  • HubSpot Contact
  • Pipedrive Person
  • Zoho Lead

Format

  • CSV (comma-separated)
  • TSV (tab-separated)
  • Pipe-delimited
  • Excel workbook (.xlsx)
  • JSON

Headers are written the way that importer expects, so the file loads without a mapping screen. A person's first and last names go in the importer's own name fields; an organization has no person name, so its name goes in the company field and the name fields are left empty. NPI is the one column you map yourself — no CRM has a standard field for it.

This selection is 321,780 rows.Browse the lists
Coverage

Counted, not claimed.

The panel beside this was counted by asking the API for each specialty when the page was rendered. A specialty it could not count is missing from the list rather than sitting there as a zero - which is the rule the rest of the site is built on, and the reason there is no round number anywhere on this page.

  • Every count read live, none typed in
  • An unreadable count is left out, never shown as nought
  • 7,041 hospitals linked to the providers who work in them
  • 763 lists published with a page of their own

Read how each count is made

Coverage by specialty/datalive
  • Nurse Practitioner586,843
  • Internal Medicine439,566
  • Dentist389,426
  • Physical Therapist337,168
  • Pharmacist334,092
  • Registered Nurse331,652
  • Family Medicine253,651
  • Physician Assistant241,292
Counts refreshed Oct 5, 2026.What is in a record
Inside a record

7 kinds of field, each with the date it was last confirmed.

Named by what you get rather than by where we got it. How often each kind moves is on the card, because a field that is a year old and a field that changed on Tuesday should not look the same.

Who the provider is

Name, credentials, NPI, individual or organization, active status, enumeration date

Weekly

What they practise

Primary and secondary taxonomies, classification and specialisation, licence state

Weekly

Where they practise

Practice and mailing address, phone and fax, additional locations, ZIP and radius search

Weekly

Who they work for

Employer and group affiliations, reassignments, organization NPI where one exists

Monthly

How to reach them

Verified work email with a trust tier, practice phone; home address and mobile on contracted plans

Continuous

Whether they are in good standing

Federal programme exclusions, opt-out and revocation flags, sanction dates

Monthly

The organisations behind them

Hospitals, hospices, home health, nursing and dialysis facilities, and who owns them

Monthly

Read the field list in full

By profession

Start where your buyers already are.

Every profession files under its own heading, which is why a physician list misses nurse practitioners and a “healthcare” list misses dentists entirely. Each page below covers one profession on its own terms: what it is filed as, how many there are, and the filters that decide a list in that profession's own words.

API

The same records, without the screen.

One bearer token, one versioned path, and every filter the search form offers. This page is built on it: the panels above are this site calling /v1/providers as a customer, with a key whose scopes decide what comes back.

Requestlive
GET /v1/providers
  ?taxonomy_classification=Internal+Medicine
  &has_email=true
  &page_size=6

Authorization: Bearer npi_live_…
Accept: application/json
This request answered 321,780 total, page 1 of 53,630.Every parameter
Questions

Straight answers.

Where does the provider data come from?

Authoritative provider records, assembled and verified by us. Every field carries the date it was last confirmed, so you can see how current a record is before you rely on it.

Is contact information shown on public pages?

No. Public pages carry the public record: name, NPI, specialty, practice location and practice phone. Email, home address and cell phone are available only to signed-in customers on a plan that includes them, revealed one provider at a time and counted.

How often is it updated?

Identity, specialty and location are refreshed weekly. Affiliations, facilities and standing are refreshed monthly. Contact data is verified continuously. The date shown on a record is when that record was last confirmed, not when the page was built.

Can I export or append my own list?

Signed-in customers can export search results and upload a file of NPIs to append fields to it, within the limits of their plan. Every export and append is logged.

Is there an API?

Yes. The same data behind this site is available over a versioned REST API with scoped keys, per-minute pacing and monthly quotas. The reference is public at /docs/api.

Start with a search

Search it before you decide anything.

Searching is free and needs no account. An account is what opens the contact details and the exports, across the 9,469,440 providers on file today.

No card to start. Home address and mobile data is contracted separately - the plans page says how.

NPI Mark reads the platform over its public API with its own key and can reach exactly what that key allows. Machine-readable description at https://npimark.com/llms.txt.