Alex Junhyuk Chang, MD
Student in an Organized Health Care Education/Training Program · San Francisco, CA
Alex Junhyuk Chang, MD is a student in an organized health care education/training program with a practice address in San Francisco, California, and NPI 1467039271, issued on Mar 26, 2021. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Alex Junhyuk Chang
- Credential
- MD
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- Practice location
- 2425 Geary Blvd, San Francisco, CA 94115
- Phone
- (415) 833-2000
- Enumerated
- Mar 26, 2021
- Record last updated
- Mar 26, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest student in an organized health care education/training program records → All 40,652 in California → Look up another NPI →
Also registered at 2425 Geary Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mia AldridgeStudent in an Organized Health Care Education/Training Program1437890761
- Catherine Grace Alejo, NPFamily Nurse Practitioner1932273521
Verify Alex Junhyuk Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average student in an organized health care education/training program in 2024
117 Medicare Part D claims for 44 beneficiaries, against an average of 185 among the 59,748 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium18 claims
- Pantoprazole Sodium13 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.
Industry payments in 2024: $20.72
1 payment: food and beverage; the largest payer was Stryker Corporation. The 13,278 providers of this specialty with any payment received $608.08 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Alex Junhyuk Chang among 40,652 student in an organized health care education/training program records in California
Alex Junhyuk Chang, MD is one of 40,652 student in an organized health care education/training program records with a practice address in California. 16% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 28% of them.
- NPI issued2021 · 28% of these records are older, 66% newer
- In a Medicare fileYes · 16% of these records are
- In the CMS Doctors and Clinicians fileNo · 6% of these records are
- Record last updated2021 · 26% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 390200000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3,035 student in an organized health care education/training program records list a practice address in San Francisco
They are 3,035 of the 38,143 NPPES records with a practice address in San Francisco, and 40,652 student in an organized health care education/training program records in California.
All 40,652 in California → Every provider in San Francisco → Student in an Organized Health Care Education/Training Program nationwide →
The 8 student in an organized health care education/training program records with the nearest ZIP codes
- Lisa Chui, M.D.San Francisco, CA 941151689992927
- Niloofar Fadaki, M.D.San Francisco, CA 941151922275783
- Choon Hwa Goh, M.D, MPHSan Francisco, CA 941151922238864
- Pristine Lee, M.DSan Francisco, CA 941151134328198
- Julia Macisaac, MDSan Francisco, CA 941151427238146
- Rebecca O'Neill, M.D.San Francisco, CA 941151356676886
- Erin PollardSan Francisco, CA 941151326271719
- Giuliette RechtSan Francisco, CA 941151861708455
Common questions
What is Alex Junhyuk Chang, MD's NPI number?
Alex Junhyuk Chang, MD's National Provider Identifier (NPI) is 1467039271, issued on Mar 26, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Alex Junhyuk Chang, MD located?
The NPPES record lists a practice address at 2425 Geary Blvd, San Francisco, CA, 94115. Phone: (415) 833-2000. Providers update this record themselves, so call before visiting.
How can I verify Alex Junhyuk Chang, MD's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Alex Junhyuk Chang, MD prescribe under Medicare Part D?
In 2024, Alex Junhyuk Chang, MD had 117 Medicare Part D claims for 44 beneficiaries; the average among student in an organized health care education/training program prescribers was 185. 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.