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NPPES

National Plan & Provider Enumeration System, info on healthcare providers registered in US

Open documentation ↗
No keyHTTPSNo CORSHealth

Verified 4 days ago: 100% uptime

API key

Not required

HTTPS

Supported

Browser calls

No, needs a proxy

Status

Live · 100/100

What our checks found

Health score
100/100
Reliability
100%
Average latency
1496ms

Last checked 2026-09-18. Measured independently, not self-reported by the provider.

How to call it

A starting template for NPPES. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.

# No authentication required.
curl -s "https://npiregistry.cms.hhs.gov/ENDPOINT" \
  -H "Accept: application/json"

This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.

Where this listing comes from

Aggregated from 2 public sources (public-api-lists, public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.

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NPPES — common questions

Answered from what our own scheduled checks found, not from the provider's marketing.

Is NPPES free to use?

NPPES is listed in our free catalogue and required no credential when we called it. It needs no authentication at all, so you can send a request without signing up. Free tiers can still carry rate limits or non-commercial terms, so check the provider's own terms before shipping.

Does NPPES need an API key?

No. We called NPPES on 2026-09-18 with no key, no token and no Authorization header, and it responded. That is what puts it in our no-key collection.

Can I call NPPES from browser JavaScript?

Not directly. NPPES did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.

Is NPPES still working?

Yes, as of 2026-09-18. Our automated check reached NPPES and recorded a 100% reliability score with a median response time of 1496 ms. We re-check on a schedule, and this page updates with the result.

Is NPPES available over HTTPS?

Yes. NPPES serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.