Yiann E. Chen, MD
Nephrology Physician · Oakland, CA
Yiann E. Chen, MD is a nephrology physician with a practice address in Oakland, California, and NPI 1891912689, issued on Apr 20, 2007. Check the license (California A100448, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Yiann E. Chen
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A100448 CA
Self-reported in NPPES; status is on the state search - Practice location
- 275 W Macarthur Blvd, Oakland, CA 94611
- Phone
- (510) 752-1000
- Enumerated
- Apr 20, 2007
- Record last updated
- Dec 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20071214000333); accepts Medicare assignment
- Medical or professional school
- Albert Einstein College Of Medicine Of Yeshiva University, 2002
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 275 W Macarthur Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Aaronson, MDUrology Physician1215053129
- Paul-Andre Abboud, M.D.Emergency Medicine Physician1710065503
- Brittany Abeldt, MDPsychiatry Physician1982353884
- Bilal Abu-Alrub, DOStudent in an Organized Health Care Education/Training Program1609760768
- Walter Acuna, MDInternal Medicine Physician1972655108
- Brett Adams, MDStudent in an Organized Health Care Education/Training Program1841731098
Verify Yiann E. Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A100448Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average nephrology physician in 2024
565 Medicare Part D claims for 146 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Losartan Potassium71 claims
- Amlodipine Besylate65 claims
- Sevelamer Carbonate52 claims
- Calcium Acetate43 claims
- Furosemide28 claims
- Jardiance26 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
- Permanente Medical Group IncOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Yiann E. Chen among 1,468 nephrology physician records in California
Yiann E. Chen, MD is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 52% of them.
- NPI issued2007 · 52% of these records are older, 35% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2002 · median 2001 among the 1,128 with a school on file
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Oakland → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Michael BernabaOakland, CA 946111568952356
- David Law, MDOakland, CA 946111235132580
- Sonny Nguyen, MDOakland, CA 946111588198204
- Uchenna NwosuOakland, CA 946111881199727
- Juan Ordonez, MDOakland, CA 946111720166507
- Guoping Xu, MDOakland, CA 946111932271681
- Sijie Zheng, M.D.Oakland, CA 946111407061823
- Yakuan Yvonne Chen, M.D.Oakland, CA 946091306959135
Common questions
What is Yiann E. Chen, MD's NPI number?
Yiann E. Chen, MD's National Provider Identifier (NPI) is 1891912689, issued on Apr 20, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Yiann E. Chen, MD located?
The NPPES record lists a practice address at 275 W Macarthur Blvd, Oakland, CA, 94611. Phone: (510) 752-1000. Providers update this record themselves, so call before visiting.
How can I verify Yiann E. Chen, MD's license?
NPPES lists California license number A100448, 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 Yiann E. Chen, MD prescribe under Medicare Part D?
In 2024, Yiann E. Chen, MD had 565 Medicare Part D claims for 146 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.