John U. Choi, DDS, PHD
Periodontics · Fullerton, CA
John U. Choi, DDS, PHD is a periodontics with a practice address in Fullerton, California, and NPI 1720126337, issued on Feb 3, 2007. Check the license (California 41375, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John U. Choi
- Credential
- DDS, PHD
- Primary taxonomy
- Periodontics 1223P0300X
- License number
- 41375 CA
Self-reported in NPPES; status is on the state search - Practice location
- 301 W Bastanchury RD, Fullerton, CA 92835
- Phone
- (714) 449-8650
- Enumerated
- Feb 3, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (714) 449-8653
- Entity
- Type 1 · individual
8 nearest periodontics records → All 929 in California → Look up another NPI →
Also registered at 301 W Bastanchury RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sean Adrean, M.D.Retina Specialist (Ophthalmology) Physician1073566568
- Ashley ChoiPeriodontics1790673747
- Michael Crial, DMDDentist1962662916
- Helia Eragi, D.O.Dermatology Physician1013283910
- John Esser, ODOptometrist1790855062
- Scott Grant, M.D.Retina Specialist (Ophthalmology) Physician1194762310
Verify John U. Choi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 41375Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% fewer Medicare Part D claims than the average periodontics in 2024
186 Medicare Part D claims for 87 beneficiaries, against an average of 277 among the 4,191 providers of this specialty who prescribed in Part D. 19 claims were for opioids.
Most prescribed
- Amoxicillin103 claims
- Metronidazole37 claims
- Hydrocodone-Acetaminophen18 claims
- Clindamycin Hcl14 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.
John U. Choi among 929 periodontics records in California
John U. Choi, DDS, PHD is one of 929 periodontics records with a practice address in California. 69% 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 · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 78% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223P0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Periodontics providers in California
There are 929 periodontics records in California.
All 929 in California → Every provider in Fullerton → Periodontics nationwide →
The 8 periodontics records with the nearest ZIP codes
- Ashley ChoiFullerton, CA 928351790673747
- Donald Clem, D.D.S.Fullerton, CA 928351770673287
- Irwin Wedner, D.D.S.Fullerton, CA 928351699727610
- Nelson Yen, D.D.S., M.S.Fullerton, CA 928351245330091
- Eric Cho, DDSFullerton, CA 928331699804203
- Gene Park, D.D.S., M.S.Fullerton, CA 928331235304791
- Alan Young, D.M.D.Garden Grove, CA 928401124062260
- Ayman Balshe, DDS, MSAnaheim, CA 928061790839629
Common questions
What is John U. Choi, DDS, PHD's NPI number?
John U. Choi, DDS, PHD's National Provider Identifier (NPI) is 1720126337, issued on Feb 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John U. Choi, DDS, PHD located?
The NPPES record lists a practice address at 301 W Bastanchury RD, Fullerton, CA, 92835. Phone: (714) 449-8650. Providers update this record themselves, so call before visiting.
How can I verify John U. Choi, DDS, PHD's license?
NPPES lists California license number 41375, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does John U. Choi, DDS, PHD prescribe under Medicare Part D?
In 2024, John U. Choi, DDS, PHD had 186 Medicare Part D claims for 87 beneficiaries; the average among periodontics prescribers was 277. 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.