How NPI and Licence Numbers Appear on Profiles

By MedXL Editorial Team · Updated 2026-08-26 · 6 min read

Physicians are often surprised to find their NPI or licence details visible on directory profiles they never created. That is usually not a breach; it reflects how public professional registries work. This guide explains where these identifiers come from, what is public by design in the United States and Canada, and how to make sure the identifiers attached to your name are accurate.

Healthcare directories exist to help patients, employers, and credentialing teams find and verify clinicians. Identifiers are what make that verification reliable. A name alone is ambiguous; there may be several physicians with your name in your own state or province. An identifier ties a profile to one specific licensed person, which protects you as much as it protects the reader.

Directories typically assemble baseline profiles from public data sources, then let the physician claim the profile and correct the editable details. On MedXL, for example, you can claim your profile and edit your specialty, affiliations, photo, and biography, while identifier-linked information stays anchored to verifiable records. Understanding which parts are public record and which parts you control is the key to managing this well.

In this guide

Why identifiers appear on profiles at all
The NPI in the United States
Licence numbers in the United States
Licence and registration numbers in Canada
What you control versus what is public record
A verification checklist you can run this week
How employers and credentialing teams use these identifiers
Common mistakes and misconceptions
Key takeaways