Stephanie Hsin-Yin Chang, D.O.
Family Medicine Physician · San Dimas, CA
Stephanie Hsin-Yin Chang, D.O. is a family medicine physician with a practice address in San Dimas, California, and NPI 1740387091, issued on Sep 20, 2006. Check the license (California 20A7055, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stephanie Hsin-Yin Chang
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A7055 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1255 W Arrow Hwy, San Dimas, CA 91773
- Phone
- (800) 780-1277
- Enumerated
- Sep 20, 2006
- Record last updated
- Dec 2, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100712000529); accepts Medicare assignment
- Medical or professional school
- At Still University Of Health Sciences, College Of Osteo Med, Kirksville, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1255 W Arrow Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Veena Bhatarakamol, D.O.Family Medicine Physician1073830964
- Christina ChaiPharmacist1346788445
- Cheryl ChanPharmacist1649718792
- Nghi Dang, D.O.Family Medicine Physician1750657193
- Erin Duncan, ODOptometrist1821191222
- Daryl EkPharmacist1841738226
Verify Stephanie Hsin-Yin Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A7055Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% more Medicare Part D claims than the average family medicine physician in 2024
6,130 Medicare Part D claims for 827 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 287 claims were for opioids.
Most prescribed
- Atorvastatin Calcium492 claims
- Lisinopril336 claims
- Amlodipine Besylate290 claims
- Losartan Potassium268 claims
- Levothyroxine Sodium256 claims
- Rosuvastatin Calcium233 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupSan Dimas, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephanie Hsin-Yin Chang among 17,133 family medicine physician records in California
Stephanie Hsin-Yin Chang, D.O. is one of 17,133 family 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1996 · median 2005 among the 10,652 with a school on file
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
29 family medicine physician records list a practice address in San Dimas
They are 29 of the 942 NPPES records with a practice address in San Dimas, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Dimas → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Norma Bachoura, M.D.San Dimas, CA 917731235191131
- Steven Davis, D.O.San Dimas, CA 917731154300978
- Maria Dunton, DOSan Dimas, CA 917731639112386
- Candido Gamez, M.D.San Dimas, CA 917731689625972
- Rosanna Iskander, M.D.San Dimas, CA 917731265500896
- Sabah Kadhium, MDSan Dimas, CA 917731306836770
- Richard Magallon, MDSan Dimas, CA 917731316925530
- Heather McDonald, D.O.San Dimas, CA 917731003142886
Common questions
What is Stephanie Hsin-Yin Chang, D.O.'s NPI number?
Stephanie Hsin-Yin Chang, D.O.'s National Provider Identifier (NPI) is 1740387091, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephanie Hsin-Yin Chang, D.O. located?
The NPPES record lists a practice address at 1255 W Arrow Hwy, San Dimas, CA, 91773. Phone: (800) 780-1277. Providers update this record themselves, so call before visiting.
How can I verify Stephanie Hsin-Yin Chang, D.O.'s license?
NPPES lists California license number 20A7055, 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 Stephanie Hsin-Yin Chang, D.O. prescribe under Medicare Part D?
In 2024, Stephanie Hsin-Yin Chang, D.O. had 6,130 Medicare Part D claims for 827 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.