Editorial Policy

Directory data (provider profiles, counts, and statistics) comes directly from the CMS NPPES public file and the NUCC taxonomy code set. We reproduce what is on file; we do not edit, rank, or editorialize it. Our data sources and methodology page explains the pipeline and update cadence.

Editorial articles, the specialty explainers and guides, are written by us. The rest of this page describes how.

• Primary sources only. Factual claims are researched from certifying boards, professional associations, and government agencies: the American Board of Urology for urology training requirements, state Medicaid manuals for Medicaid service rules, and so on. We do not source facts from other lookup sites or content aggregators.
• Every claim traces to a source. During research we record each factual claim alongside the exact source that supports it. A fact we cannot verify against a source we actually consulted is left out rather than approximated.
• Sources are published. Each article lists the sources used to write it, so readers can check our work.
• Human review before publication. Every article is fact-checked against its sources, edited, and approved by a human editor before it appears on the site. Nothing is published automatically.

• No medical advice. Our articles explain what provider types do and how they are credentialed. They are informational and never a substitute for advice from a qualified professional.
• No ratings, reviews, or opinions of providers. We publish the facts on file with NPPES and nothing else about individual providers.
• No sponsored claims. Advertising on the site is clearly delineated and has no influence on article content or which specialties we cover.

Directory data refreshes with each NPPES release; the current snapshot is dated 2026-07-13. Articles show the date they were last reviewed or updated, and we revisit them when the underlying rules change; licensure laws, training standards, and Medicaid program rules do move.

Source: CMS NPPES (public data). Snapshot 2026-07-13.

If we got something wrong in an article, email hello@npiportal.com with the page URL and the issue. We correct verified errors promptly and update the article's revision date. Corrections to a provider's own record must be made in NPPES itself; see corrections & removal.