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NPI Registry Search - US Healthcare Providers

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Searches the NPPES NPI Registry for US doctors, dentists, clinics and other healthcare providers, with practice address, phone and specialty. NPPES caps any one search at 1,200 records and never says how many matched, so every row here carries whether the answer is complete. No key and no login.

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Pay per event

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Developer

Gregory Bolshakov

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20 hours ago

Last modified

Categories

Lead generation

Business

MCP servers

npi

Optional

The provider's 10-digit National Provider Identifier. Unique and permanent, so it is the key to join these rows to anything else.

Type:string | null

entityType

Optional

individual for a person, organization for a practice or facility. Which name fields are filled depends on this, because NPPES stores the two entirely differently.

Type:string | null

enumerationType

Optional

NPPES's own name for the entity type: NPI-1 for an individual, NPI-2 for an organisation.

Type:string | null

organizationName

Optional

The organisation's legal name. Null on individual providers.

Type:string | null

firstName

Optional

The provider's first name. Null on organisations.

Type:string | null

lastName

Optional

The provider's last name. Null on organisations.

Type:string | null

middleName

Optional

The provider's middle name, where NPPES holds one.

Type:string | null

namePrefix

Optional

Title such as Dr. or Mr., on individual providers. Present on 42% of 600 sampled individual records.

Type:string | null

nameSuffix

Optional

Suffix such as Jr. or III, on individual providers. Present on 26% of 600 sampled individual records.

Type:string | null

credential

Optional

Credential as the provider filed it, for example MD, DDS or NP. Free text, so spelling and punctuation vary between records.

Type:string | null

sex

Optional

M or F, on individual providers only. NPPES names this field sex rather than gender, and it was filled on all 600 individual records sampled on 2026-08-31.

Type:string | null

soleProprietor

Optional

Whether an individual provider files as a sole proprietor.

Type:string | null

authorizedOfficialName

Optional

The person NPPES lists as the organisation's authorised official. Null on individual providers, where the provider is the person.

Type:string | null

authorizedOfficialTitle

Optional

That official's title, for example CEO or Medical Director.

Type:string | null

authorizedOfficialPhone

Optional

That official's telephone number as filed. Often the same number as the practice line.

Type:string | null

status

Optional

NPPES status code. A is active. Measured on 4,600 records across 12 query shapes on 2026-08-31, every record a search returned had status A, so this column is near constant in practice. It is kept because the field is the source's and a value other than A would matter.

Type:string | null

isActive

Optional

True when status is A. Every one of 4,600 sampled search results was active, so a search does not appear to return deactivated NPIs at all. Do not read a row's presence here as proof the provider is still practising: the record can be years stale and still active, which is what lastUpdated is for.

Type:boolean | null

enumerationDate

Optional

When the NPI was first issued.

Type:string | null

certificationDate

Optional

When the record was last certified by its owner.

Type:string | null

lastUpdated

Optional

When NPPES last changed the record. A record untouched for years is still returned as current.

Type:string | null

deactivationDate

Optional

When the NPI was deactivated, where NPPES gives a date.

Type:string | null

practiceAddress

Optional

Street address of the practice location. This is the address_purpose LOCATION record, never the mailing one.

Type:string | null

practiceCity

Optional

City of the practice location.

Type:string | null

practiceState

Optional

State of the practice location.

Type:string | null

practicePostalCode

Optional

Postal code of the practice location, usually nine digits with no separator.

Type:string | null

practicePhone

Optional

Telephone number filed against the practice location.

Type:string | null

practiceFax

Optional

Fax number filed against the practice location.

Type:string | null

mailingAddress

Optional

Street address of the mailing record, kept separate on purpose. It is often a billing service in another state, so it is not interchangeable with the practice address.

Type:string | null

mailingCity

Optional

City of the mailing record. Measured on 4,600 records, this differs from the practice city on 32.8% of them, which is why the two are never merged into one address.

Type:string | null

mailingState

Optional

State of the mailing record.

Type:string | null

mailingPostalCode

Optional

Postal code of the mailing record.

Type:string | null

mailingPhone

Optional

Telephone number filed against the mailing record.

Type:string | null

primaryTaxonomyCode

Optional

NUCC code of the primary specialty, chosen by the record's own primary flag rather than by position in the list.

Type:string | null

primaryTaxonomyDescription

Optional

The primary specialty in words, for example Dermatology.

Type:string | null

primaryTaxonomySource

Optional

How the primary specialty was decided. primary-flag means NPPES flagged exactly one, and it was the value on all 4,600 records sampled on 2026-08-31. The other three values, none-flagged-primary, several-flagged-primary and no-taxonomy, exist so a record that breaks that pattern is reported rather than quietly given whichever specialty came first in the list.

Type:string | null

taxonomyCount

Optional

How many specialties the record holds in total.

Type:integer | null

allTaxonomyDescriptions

Optional

Every specialty on the record, in the order NPPES returns them.

Type:array | null

licenseNumber

Optional

State licence number attached to the primary specialty. Many records carry none.

Type:string | null

licenseState

Optional

State that issued that licence, which is not always the practice state.

Type:string | null

practiceLocationCount

Optional

How many additional practice locations the record lists beyond the one address above. 7.8% of 4,600 sampled records had at least one, so a provider working at several sites is still one row and this is the only column that says so.

Type:integer | null

practiceLocationCities

Optional

The distinct cities of those extra locations, as CITY, ST. NPPES matches a city or state search against them as well as against the practice address, so this is often the column that explains why an out of state provider is in your results.

Type:string[]

otherNames

Optional

Other names the record carries, such as a former or trading name.

Type:array | null

searchSlice

Optional

The exact NPPES query this row came from. On a search that had to be split it names the piece, not the whole.

Type:string | null

searchComplete

Optional

Whether the search that produced this row returned every matching provider. NPPES caps any one search at 1,200 records and publishes no total, so without this column a capped answer and a whole one are indistinguishable.

Type:boolean | null

searchLimitedBy

Optional

Null when the answer is complete. sourceCeiling means NPPES cut it and no further split was available. maxResults means you asked for fewer rows than exist. requestBudget and timeBudget mean the run stopped itself.

Type:string | null

searchRowsReturned

Optional

How many rows the search produced in total, so a single row still says how large the answer it came from was.

Type:integer | null

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