Hsu-Hsiang Chang, D.O.
Emergency Medicine Physician · Pomona, CA
Hsu-Hsiang Chang, D.O. is an emergency medicine physician with a practice address in Pomona, California, and NPI 1932546603, issued on Jun 4, 2013. Check the license (California 20A15344, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Hsu-Hsiang Chang
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 20A15344 CA
5101020307 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1798 N Garey Ave, Pomona, CA 91767
- Phone
- (909) 865-9917
- Enumerated
- Jun 4, 2013
- Record last updated
- Sep 21, 2023
- Medicare enrollment
- Enrolled (PECOS I20170706002852); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1798 N Garey Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Monique AbdallaRegistered Nurse1871398297
- Brent Abutin, PTAPhysical Therapy Assistant1144728023
- Anna Adongo, M.D.Anesthesiology Physician1497011902
- Fran Allas, OTR/LNeurorehabilitation Occupational Therapist1467081828
- Yvette Ambroze, FNPFamily Nurse Practitioner1336616879
- Arjun Bakshi, DOEmergency Medicine Physician1659968303
Verify Hsu-Hsiang Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A15344Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.2 times the Medicare Part D claims of the average emergency medicine physician in 2024
726 Medicare Part D claims for 440 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 90 claims were for opioids.
Most prescribed
- Cephalexin96 claims
- Ondansetron Odt90 claims
- Hydrocodone-Acetaminophen70 claims
- Ibuprofen51 claims
- Prednisone37 claims
- Albuterol Sulfate Hfa30 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 85 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Southern California Permanente Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hsu-Hsiang Chang among 7,751 emergency medicine physician records in California
Hsu-Hsiang Chang, D.O. is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 66% of them.
- NPI issued2013 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2013 · median 2011 among the 4,560 with a school on file
- Record last updated2023 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Pomona → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Donald Barceloux, M.D.Pomona, CA 917671295746386
- Gregory Burke, M.DPomona, CA 917671407940117
- Wesley Curry, M.DPomona, CA 917671194774935
- Richard Dorosh, M.D.Pomona, CA 917671902928690
- John Lee, M.DPomona, CA 917671538178272
- Lee Maas, M.D.Pomona, CA 917671548470081
- Keith McCarty, M.D.Pomona, CA 917671538171426
- Kenneth Nakamoto, M.D.Pomona, CA 917671215949102
Common questions
What is Hsu-Hsiang Chang, D.O.'s NPI number?
Hsu-Hsiang Chang, D.O.'s National Provider Identifier (NPI) is 1932546603, issued on Jun 4, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Hsu-Hsiang Chang, D.O. located?
The NPPES record lists a practice address at 1798 N Garey Ave, Pomona, CA, 91767. Phone: (909) 865-9917. Providers update this record themselves, so call before visiting.
How can I verify Hsu-Hsiang Chang, D.O.'s license?
NPPES lists California license number 20A15344, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Hsu-Hsiang Chang, D.O. prescribe under Medicare Part D?
In 2024, Hsu-Hsiang Chang, D.O. had 726 Medicare Part D claims for 440 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Hsu-Hsiang Chang, D.O.'s MIPS final score?
The 2023 MIPS final score is 85 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.