Stephen Chang, MD
Family Medicine Physician · Tustin, CA
Stephen Chang, MD is a family medicine physician with a practice address in Tustin, California, and NPI 1043715410, issued on Mar 28, 2018. Check the license (California A164576, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stephen Chang
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A164576 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1451 Irvine Blvd, Tustin, CA 92780
- Phone
- (714) 838-8878
- Enumerated
- Mar 28, 2018
- Record last updated
- Nov 3, 2022
- Medicare enrollment
- Enrolled (PECOS I20210813000162); accepts Medicare assignment
- Medical or professional school
- Rush Medical College Of Rush University, 2013
- 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 1451 Irvine Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amanda Hall, NPNurse Practitioner1073023420
- Almoatazbellah Idriss, MDEndocrinology, Diabetes & Metabolism Physician1881649853
Verify Stephen Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A164576Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average family medicine physician in 2024
1,923 Medicare Part D claims for 319 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 28 claims were for opioids.
Most prescribed
- Atorvastatin Calcium125 claims
- Losartan Potassium106 claims
- Amlodipine Besylate89 claims
- Levothyroxine Sodium57 claims
- Omeprazole52 claims
- Metformin Hcl51 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
- Regents OF The University OF CaliforniaOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen Chang among 17,133 family medicine physician records in California
Stephen Chang, MD 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 2018, is newer than 82% of them.
- NPI issued2018 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2013 · median 2005 among the 10,652 with a school on file
- Record last updated2022 · 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).
42 family medicine physician records list a practice address in Tustin
They are 42 of the 2,221 NPPES records with a practice address in Tustin, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Tustin → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Karen Babel, MDTustin, CA 927801558366260
- Renee Ballentine, DOTustin, CA 927801043387046
- Pedro Carrillo, MDTustin, CA 927801154330504
- Karmen Cohen, D.O.Tustin, CA 927801447377296
- William Crumpton, M,D.Tustin, CA 927801205989373
- Tahany Habashy, MDTustin, CA 927801619064953
- Eva Katz, M.D.Tustin, CA 927801407936248
- Susie Kim, MDTustin, CA 927801760671549
Common questions
What is Stephen Chang, MD's NPI number?
Stephen Chang, MD's National Provider Identifier (NPI) is 1043715410, issued on Mar 28, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Chang, MD located?
The NPPES record lists a practice address at 1451 Irvine Blvd, Tustin, CA, 92780. Phone: (714) 838-8878. Providers update this record themselves, so call before visiting.
How can I verify Stephen Chang, MD's license?
NPPES lists California license number A164576, 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 Stephen Chang, MD prescribe under Medicare Part D?
In 2024, Stephen Chang, MD had 1,923 Medicare Part D claims for 319 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.