Yaojen Chang, DDS
Dentist · West Covina, CA
Yaojen Chang, DDS is a dentist with a practice address in West Covina, California, and NPI 1891893152, issued on Sep 20, 2006. Check the license (California 52589, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Yaojen Chang
- Credential
- DDS
- Primary taxonomy
- Dentist 122300000X
- License number
- 52589 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1129 South Glendora Avenue, West Covina, CA 91790
- Phone
- (626) 919-7707
- Enumerated
- Sep 20, 2006
- Record last updated
- Feb 13, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (626) 851-0985
- Entity
- Type 1 · individual
8 nearest dentist records → All 14,729 in California → Look up another NPI →
Also registered at 1129 South Glendora Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rami Kouz, DDSDentist1528171915
Verify Yaojen Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 52589Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% more Medicare Part D claims than the average dentist in 2024
120 Medicare Part D claims for 58 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin51 claims
- Ibuprofen42 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.
Yaojen Chang among 14,729 dentist records in California
Yaojen Chang, DDS is one of 14,729 dentist records with a practice address in California. 56% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 82% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2016 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
66 dentist records list a practice address in West Covina
They are 66 of the 2,450 NPPES records with a practice address in West Covina, and 14,729 dentist records in California.
All 14,729 in California → Every provider in West Covina → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Faria Chohan, DMDWest Covina, CA 917901629261151
- Gerald Garcia, DMDW Covina, CA 917901104978972
- Young Kim, DDSWest Covina, CA 917901710990940
- Jeong Kim, DDSWest Covina, CA 917901144439720
- Rami Kouz, DDSWest Covina, CA 917901528171915
- Lilian Ong, DDSWest Covina, CA 917901669547659
- Gregory Robins, DDSWest Covina, CA 917901750588877
- Ramzi Sawabini, DDSWest Covina, CA 917901215023106
Common questions
What is Yaojen Chang, DDS's NPI number?
Yaojen Chang, DDS's National Provider Identifier (NPI) is 1891893152, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Yaojen Chang, DDS located?
The NPPES record lists a practice address at 1129 South Glendora Avenue, West Covina, CA, 91790. Phone: (626) 919-7707. Providers update this record themselves, so call before visiting.
How can I verify Yaojen Chang, DDS's license?
NPPES lists California license number 52589, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Yaojen Chang, DDS prescribe under Medicare Part D?
In 2024, Yaojen Chang, DDS had 120 Medicare Part D claims for 58 beneficiaries; the average among dentist prescribers was 86. 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.