# PECOS Lookup
> Free, evidence-first U.S. healthcare provider verification
> built on public CMS and OIG data. Every fact carries its
> source name, data vintage or live-lookup timestamp, and the
> time it was checked.

## Key pages
- [PECOS Lookup](https://pecos.episodealert.com/): look up a provider by NPI or name
- [Data sources & methodology](https://pecos.episodealert.com/sources): the loaded public files, refresh cadence, and what is not claimed
- [Terms](https://pecos.episodealert.com/terms)

## Provider pages
- Provider summaries: https://pecos.episodealert.com/providers/<10-digit NPI> — server-rendered public-file facts with source, vintage, and fetch date on every line

## Browse indexes
- [Vermont provider index](https://pecos.episodealert.com/providers/vt)

## Guides
- [Medicare Reassignment of Benefits Explained | PECOS Lookup](https://pecos.episodealert.com/guides/medicare-reassignment-of-benefits)
- [NPI vs PECOS: What's the Difference? | PECOS Lookup](https://pecos.episodealert.com/guides/npi-vs-pecos)
- [How to Check PECOS Enrollment Status Free | PECOS Lookup](https://pecos.episodealert.com/guides/check-pecos-enrollment)
- [How to Check If a Provider Opted Out of Medicare | PECOS Lookup](https://pecos.episodealert.com/guides/medicare-opt-out-check)
- [Medicare Revalidation: How to Find a Due Date | PECOS Lookup](https://pecos.episodealert.com/guides/medicare-revalidation-due-date)
- [Ordering & Referring Eligibility: How to Check an NPI | PECOS Lookup](https://pecos.episodealert.com/guides/ordering-referring-eligibility)
- [OIG Exclusion Check: LEIE, SAM & State Lists | PECOS Lookup](https://pecos.episodealert.com/guides/oig-exclusion-check)