Ellen Dias De Oliveira Chiang, MD
Student in an Organized Health Care Education/Training Program · San Francisco, CA
Ellen Dias De Oliveira Chiang, MD is a student in an organized health care education/training program with a practice address in San Francisco, California, and NPI 1790425148, issued on Mar 31, 2022. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ellen Dias De Oliveira Chiang
- Credential
- MD
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- Practice location
- 521 Parnassus Ave FL 7, San Francisco, CA 94143
- Phone
- (415) 353-1529
- Enumerated
- Mar 31, 2022
- Record last updated
- Mar 31, 2022
- 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 521 Parnassus Ave FL 7
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Tommaso Bulfone, MD, MSStudent in an Organized Health Care Education/Training Program1538912720
- Abigail BurrStudent in an Organized Health Care Education/Training Program1962198176
- Elena CappelloStudent in an Organized Health Care Education/Training Program1366192668
- Maria ChenStudent in an Organized Health Care Education/Training Program1396502696
Verify Ellen Dias De Oliveira Chiang 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
94% fewer Medicare Part D claims than the average student in an organized health care education/training program in 2024
11 Medicare Part D claims, against an average of 185 among the 59,748 providers of this specialty who prescribed in Part D.
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.
Ellen Dias De Oliveira Chiang among 40,652 student in an organized health care education/training program records in California
Ellen Dias De Oliveira Chiang, 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 2022, is newer than 34% of them.
- NPI issued2022 · 34% of these records are older, 58% newer
- In a Medicare fileYes · 16% of these records are
- In the CMS Doctors and Clinicians fileNo · 6% of these records are
- Record last updated2022 · 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
- Andrew Bellinger, M.D., PH.D.San Francisco, CA 941431831327402
- Molly Burnett, MDSan Francisco, CA 941431619107638
- Sheila Chan, M.D.San Francisco, CA 941431487895793
- Fred Chen, M.D.San Francisco, CA 941431932390325
- Jeffrey Ghassemi, M.D., M.P.H.San Francisco, CA 941431972746253
- Vasantha Jotwani, M.D.San Francisco, CA 941431043448996
- Vy-Van Le, MDSan Francisco, CA 941431265661136
- Katherine Naidu, M.D.San Francisco, CA 941431265668115
Common questions
What is Ellen Dias De Oliveira Chiang, MD's NPI number?
Ellen Dias De Oliveira Chiang, MD's National Provider Identifier (NPI) is 1790425148, issued on Mar 31, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Ellen Dias De Oliveira Chiang, MD located?
The NPPES record lists a practice address at 521 Parnassus Ave FL 7, San Francisco, CA, 94143. Phone: (415) 353-1529. Providers update this record themselves, so call before visiting.
How can I verify Ellen Dias De Oliveira Chiang, MD's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Ellen Dias De Oliveira Chiang, MD prescribe under Medicare Part D?
In 2024, Ellen Dias De Oliveira Chiang, MD had 11 Medicare Part D claims; 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.