Toan Duy Nguyen, D.D.S.
General Practice Dentistry · San Dimas, CA
Toan Duy Nguyen, D.D.S. is a general practice dentistry with a practice address in San Dimas, California, and NPI 1578781548, issued on Apr 23, 2007. Check the license (California 45302, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Toan Duy Nguyen
- Credential
- D.D.S.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 45302 CA
Self-reported in NPPES; status is on the state search - Practice location
- 213 N San Dimas Ave, San Dimas, CA 91773
- Phone
- (909) 599-3398
- Enumerated
- Apr 23, 2007
- Record last updated
- Feb 7, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (909) 599-1398
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 17,852 in California → Look up another NPI →
Also registered at 213 N San Dimas Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dan Sizemore, DDSGeneral Practice Dentistry1578579900
Verify Toan Duy Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 45302Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% fewer Medicare Part D claims than the average general practice dentistry in 2024
49 Medicare Part D claims for 28 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin27 claims
- Ibuprofen15 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.
Toan Duy Nguyen among 17,852 general practice dentistry records in California
Toan Duy Nguyen, D.D.S. is one of 17,852 general practice dentistry records with a practice address in California. 57% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 29% of them.
- NPI issued2007 · 29% of these records are older, 40% newer
- In a Medicare fileYes · 57% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2013 · 79% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
15 general practice dentistry records list a practice address in San Dimas
They are 15 of the 942 NPPES records with a practice address in San Dimas, and 17,852 general practice dentistry records in California.
All 17,852 in California → Every provider in San Dimas → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Mario Aleman, D.D.S.San Dimas, CA 917731396955209
- Mohammad Ascha, DDSSan Dimas, CA 917731093722704
- Raymond Hoyt, DDSSan Dimas, CA 917731396885125
- George Ibrahim, D.M.D.San Dimas, CA 917731265861801
- Bennett Jeong, DDSSan Dimas, CA 917731700869039
- Yanina Jouzy, D.D.S.San Dimas, CA 917731144482571
- Deena Kassab, DMDSan Dimas, CA 917731053202572
- Andrew Mikhail, DDSSan Dimas, CA 917731447878988
Common questions
What is Toan Duy Nguyen, D.D.S.'s NPI number?
Toan Duy Nguyen, D.D.S.'s National Provider Identifier (NPI) is 1578781548, issued on Apr 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Toan Duy Nguyen, D.D.S. located?
The NPPES record lists a practice address at 213 N San Dimas Ave, San Dimas, CA, 91773. Phone: (909) 599-3398. Providers update this record themselves, so call before visiting.
How can I verify Toan Duy Nguyen, D.D.S.'s license?
NPPES lists California license number 45302, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Toan Duy Nguyen, D.D.S. prescribe under Medicare Part D?
In 2024, Toan Duy Nguyen, D.D.S. had 49 Medicare Part D claims for 28 beneficiaries; the average among general practice dentistry prescribers was 83. 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.