Research

One in six Orange County dentists in the federal registry has no current license

Written by the Vetted Dentists team from the sources listed below. Published November 10, 2026.

The short answer

The federal provider registry lists 3,978 dentists with a practice address in Orange County. When we matched each one to the Dental Board of California license file for November 2026, 707 of them, or 17.8%, had no current California license.

That does not mean 707 people are practicing without a license. It means the public record that many online directories are built from is often years out of date.

What we found

License status	Dentists	Share	What it means
Current	3,271	82.2%	Licensed to practice. Listed in this directory.
Delinquent	318	8.0%	The license passed its expiry date and was not renewed.
Inactive	79	2.0%	The dentist holds a license but may not practice under it.
No matching license	310	7.8%	No current, delinquent or inactive license could be matched.
All dentists in the registry	3,978	100%

The state file lists current, delinquent and inactive licenses only. A registry record with no match could belong to a dentist whose license has left that file, a dentist licensed in another state, or a license number entered incorrectly in the registry.

Why the records are out of date

Dentists who bill insurers need a National Provider Identifier, and the registry record behind it is public. The provider is responsible for keeping that record up to date: federal rules require covered providers to report changes within 30 days. Our comparison shows that many records are not updated, and that a record can stay in place long after a license has lapsed.

How old the records are

The age of the records shows it. Of the 707 records with no current license, 579 (81.9%) were last updated before 2015, and half were last updated in 2007 or earlier. Among dentists with a current license, 48.2% of records are that old, and the midpoint is 2015.

City by city

These are the 12 Orange County cities with the most dentists in the registry. The share without a current license ranges from 11.6% to 28.5%.

City	Dentists in the registry	No current license	Share
Irvine	411	62	15.1%
Anaheim	323	47	14.6%
Santa Ana	302	49	16.2%
Orange	288	50	17.4%
Huntington Beach	244	41	16.8%
Westminster	182	34	18.7%
Garden Grove	179	34	19.0%
Newport Beach	179	51	28.5%
Tustin	178	26	14.6%
Fullerton	159	27	17.0%
Mission Viejo	135	28	20.7%
Costa Mesa	121	14	11.6%

Figures for all 36 cities are in a CSV file you can download.

What this does and does not show

It shows that a directory built from the federal registry alone would list 707 Orange County dentists who have no current California license.
It does not show that any of them is treating patients. We compared two sets of records. We did not visit or call any office.
It may overcount. A dentist whose name or license number is recorded differently in the two sources can fail to match. Where the license number was missing or did not agree with the name, we accepted a match only when exactly one licensee had the same name.
It covers one county and one month. A license can change status at any time, and the state file is refreshed monthly.

Why it matters if you are choosing a dentist

A name on a website is not proof of a license. Checking takes two minutes, and our guide shows how to check a dentist’s license in California. This directory lists only the 3,271 dentists who matched a current license, and repeats the check every month. You can browse them from the Orange County page.

How we did it

We pulled every individual dentist record with an Orange County practice address from the federal NPPES NPI Registry, and left out hygienists, dental assistants, students and laboratories.
We merged duplicate records for the same person, which left 3,978 dentists.
We downloaded the Dental Board of California licensee file that the Department of Consumer Affairs publishes each month.
We matched each dentist to a license by license number, and confirmed that the names agreed.
We counted each dentist once, under the status the state file showed in November 2026.

The full method, including how addresses are confirmed, is on our how we verify page. For the statewide picture, see our map of dentists per capita in every California county.

For reporters and researchers

You are welcome to use these figures with credit to Vetted Dentists and a link to this page. The city-level data contains counts only and names no dentist. For questions about the method, or figures for a specific city, use the contact page and choose “Press or data question”.

Questions people ask

Does this mean 707 people are practicing dentistry without a license?

No. It means their federal registry record still shows an Orange County practice address while the state file shows no current license. Most of these records are old, and a likely explanation for many is that the dentist retired, moved away or stopped practicing. We did not check whether any of them is seeing patients.

Why does the federal registry still list them?

Providers are required to report changes to their record within 30 days, but as these figures show, many records are not updated, and a record can stay public long after a license has lapsed.

How can I check my own dentist?

Enter the dentist’s name or license number in the California Department of Consumer Affairs license search at search.dca.ca.gov. It shows the live status and expiry date.

Can I use these figures?

Yes. Please credit Vetted Dentists and link to this page. The city-level figures are available as a CSV file, and the method is described above.

Sources

This guide is general information, not dental or medical advice. Ask a licensed dentist about your own situation.