NPPES API
Overview
The NPPES NPI Registry API lets you look up US healthcare providers by their National Provider Identifier (NPI) number or by name and specialty. It is completely free with no authentication required and returns detailed provider information including address, taxonomy, and contact details. This is useful for building healthcare directories or verifying provider credentials.
Beginner Tip
Search by a provider's last name and state using the number and enumeration_type parameters to narrow results — the API can return up to 200 records per request.
Available Data
Example Response
{
"name": "Japan",
"capital": "Tokyo",
"population": 125800000,
"region": "Asia",
"languages": [
"Japanese"
],
"flag": "https://flagcdn.com/jp.svg",
"currencies": [
{
"code": "JPY",
"name": "Japanese yen"
}
]
} Field Reference
result_count Total number of providers matching the search criteria. results Array of matching provider records. number The 10-digit National Provider Identifier (NPI) for the provider. enumeration_type Provider type: NPI-1 for individuals, NPI-2 for organizations. taxonomies List of provider specialty taxonomies with codes and descriptions. addresses Mailing and practice location addresses for the provider. Implementation Example
const url = "https://npiregistry.cms.hhs.gov/registry/help-api";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
Common Errors & Troubleshooting
Matrix Score Breakdown
Fully tested on Apr 5, 2026
Technical Specifications
Related Tags
Similar APIs
View All →Coronavirus
This Coronavirus API provides the latest global Covid-19 case counts, deaths, and recoveries aggregated from public health sources.
Coronavirus in the UK
The Coronavirus in the UK API provides official UK Government data on Covid-19 cases, deaths, and vaccinations broken down by region and nation.
Covid Tracking Project
⭐ Beginner's PickThe Covid Tracking Project API provides historical US Covid-19 data including tests, hospitalizations, and deaths at the state and national level.
Covid-19
Covid-19 provides programmatic access to covid 19 spread, infection and recovery via REST API.
Covid-19
⭐ Beginner's PickThe Covid-19 API by M-Media Group provides daily case counts, deaths, and recoveries for every country in the world.