Joseph J. Hsiou, DDS
Periodontics · South Pasadena, CA
Joseph J. Hsiou, DDS is a periodontics with a practice address in South Pasadena, California, and NPI 1689813735, issued on Feb 12, 2009. Check the license (California 28005, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Joseph J. Hsiou
- Credential
- DDS
- Primary taxonomy
- Periodontics 1223P0300X
- License number
- 28005 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2130 Huntington Dr, South Pasadena, CA 91030
- Phone
- (626) 441-4511
- Enumerated
- Feb 12, 2009
- Record last updated
- Feb 12, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (626) 441-4512
- Entity
- Type 1 · individual
8 nearest periodontics records → All 929 in California → Look up another NPI →
Also registered at 2130 Huntington Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tom Eisenberg, PH.D.Psychologist1669509733
- Yan Qiu Hu, O.M.D., L.AC.Acupuncturist1669676763
Verify Joseph J. Hsiou in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 28005Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average periodontics in 2024
13 Medicare Part D claims, against an average of 277 among the 4,191 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Joseph J. Hsiou among 929 periodontics records in California
Joseph J. Hsiou, DDS 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 2009, is newer than 67% of them.
- NPI issued2009 · 67% of these records are older, 30% 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 updated2009 · 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 South Pasadena → Periodontics nationwide →
The 8 periodontics records with the nearest ZIP codes
- Mark Pak, D.D.S.Montrose, CA 910201336365790
- Jeesoo Choe, DDSTujunga, CA 910421598131302
- Soma Esmailian Lari, DMDTujunga, CA 910421083080097
- Leshin Chen, DDSArcadia, CA 910071356539050
- Joseph Fuentes, DDSArcadia, CA 910071578570065
- Chang Hsiang Huo, DENTISTArcadia, CA 910071285756981
- Jiunn Der Hwang, DDSArcadia, CA 910071295867349
- Donna Klauser, D.D.S.Arcadia, CA 910071851430029
Common questions
What is Joseph J. Hsiou, DDS's NPI number?
Joseph J. Hsiou, DDS's National Provider Identifier (NPI) is 1689813735, issued on Feb 12, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Joseph J. Hsiou, DDS located?
The NPPES record lists a practice address at 2130 Huntington Dr, South Pasadena, CA, 91030. Phone: (626) 441-4511. Providers update this record themselves, so call before visiting.
How can I verify Joseph J. Hsiou, DDS's license?
NPPES lists California license number 28005, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Joseph J. Hsiou, DDS prescribe under Medicare Part D?
In 2024, Joseph J. Hsiou, DDS had 13 Medicare Part D claims; 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.