NPPES file of Aug 9, 2026

Justin Lee Nguyen

Oral and Maxillofacial Surgery (Dentist) · Placentia, CA

Justin Lee Nguyen is an oral and maxillofacial surgery (dentist) with a practice address in Placentia, California, and NPI 1639599376, issued on Apr 21, 2014. Check the license (California A166485, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1639599376
Name
Justin Lee Nguyen
Primary taxonomy
Oral and Maxillofacial Surgery (Dentist) 1223S0112X
License number
A166485 CA
Self-reported in NPPES; status is on the state search
Practice location
1251 E Imperial Hwy, Placentia, CA 92870
Phone
(714) 528-8292
Enumerated
Apr 21, 2014
Record last updated
Dec 20, 2021 (not updated in 5 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 1251 E Imperial Hwy

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Gregory Mohr, D.D.S.General Practice Dentistry1205053238
  2. Van Nguyen, DMDDentist1023472123

Verify Justin Lee Nguyen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license A166485
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
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77% fewer Medicare Part D claims than the average oral and maxillofacial surgery (dentist) in 2024

93 Medicare Part D claims for 35 beneficiaries, against an average of 406 among the 5,870 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.

  1. Justin Nguyen93
  2. Specialty average406

Most prescribed

  1. Chlorhexidine Gluconate33 claims
  2. Amoxicillin31 claims
  3. Ibuprofen24 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $50.49

2 payments; by number, the most common kind was food and beverage; the largest payer was Dentsply Sirona Inc. The 4,075 providers of this specialty with any payment received $1,077.58 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Justin Nguyen$50.49
  2. Specialty average$1,077.58

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Oral and Maxillofacial Surgery (Dentist) providers in California

There are 987 oral and maxillofacial surgery (dentist) records in California.

Other oral and maxillofacial surgery (dentist) records in California

  1. Allan AbayevLoma Linda, CA1992649479
  2. Hooman Adamous, DMDBellflower, CA1497917439
  3. David Adams, DDSFresno, CA1831282755
  4. Arman Afifi, D.D.S., M.D.Cupertino, CA1528494598
  5. Payam Afzali, DDS, MDLos Angeles, CA1326350851
  6. Jacob Agatstein, D.M.D.Torrance, CA1932410842
  7. Jasmine Aghajani, DDSBeverly Hills, CA1871966622
  8. Virginia AgustinLa Puente, CA1376726315
  9. David Ahn, DMDSan Francisco, CA1265865216
  10. Junil Ahn, D.D.S.,M.D.Aliso Viejo, CA1992829949

Common questions

What is Justin Lee Nguyen's NPI number?

Justin Lee Nguyen's National Provider Identifier (NPI) is 1639599376, issued on Apr 21, 2014. An NPI identifies a provider in billing; it is not a license.

Where is Justin Lee Nguyen located?

The NPPES record lists a practice address at 1251 E Imperial Hwy, Placentia, CA, 92870. Phone: (714) 528-8292. Providers update this record themselves, so call before visiting.

How can I verify Justin Lee Nguyen's license?

NPPES lists California license number A166485, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Justin Lee Nguyen prescribe under Medicare Part D?

In 2024, Justin Lee Nguyen had 93 Medicare Part D claims for 35 beneficiaries; the average among oral and maxillofacial surgery (dentist) prescribers was 406. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.