Mychi Thi Nguyen, M.D.
Internal Medicine Physician · Oakland, CA
Mychi Thi Nguyen, M.D. is an internal medicine physician with a practice address in Oakland, California, and NPI 1366615163, issued on Apr 12, 2008. Check the license (California A103314, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mychi Thi Nguyen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A103314 CA
Self-reported in NPPES; status is on the state search - Practice location
- 250 E 18TH St, Oakland, CA 94606
- Phone
- (510) 735-3888
- Enumerated
- Apr 12, 2008
- Record last updated
- Jul 21, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (510) 628-0568
- Medicare enrollment
- Enrolled (PECOS I20110524000288); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 250 E 18TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Linh NguyenRegistered Nurse1750937710
- Qiao Hong RowleyRegistered Nurse1891341004
Verify Mychi Thi Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A103314Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,808 Medicare Part D claims for 194 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 34 claims were for opioids.
Most prescribed
- Atorvastatin Calcium398 claims
- Losartan Potassium294 claims
- Amlodipine Besylate191 claims
- Metformin Hcl163 claims
- Alendronate Sodium127 claims
- Gabapentin96 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
- Asian Health ServicesOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mychi Thi Nguyen among 17,696 internal medicine physician records in California
Mychi Thi Nguyen, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2006 · median 2004 among the 11,065 with a school on file
- Record last updated2016 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
432 internal medicine physician records list a practice address in Oakland
They are 432 of the 18,558 NPPES records with a practice address in Oakland, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Oakland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Yin Aye, MDOakland, CA 946061548447675
- Benjamin Beers, M.D.Oakland, CA 946061356502660
- Benjamin Chen, M.D.Oakland, CA 946061760744874
- Christopher John Co, M.DOakland, CA 946061679704969
- Bay Dang-Vu, MDOakland, CA 946061376575639
- Robert Davis, MDOakland, CA 946061881772952
- Dipankar Ghosh, DOOakland, CA 946061508020009
- Bill Longwell, MDOakland, CA 946061821169475
Common questions
What is Mychi Thi Nguyen, M.D.'s NPI number?
Mychi Thi Nguyen, M.D.'s National Provider Identifier (NPI) is 1366615163, issued on Apr 12, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Mychi Thi Nguyen, M.D. located?
The NPPES record lists a practice address at 250 E 18TH St, Oakland, CA, 94606. Phone: (510) 735-3888. Providers update this record themselves, so call before visiting.
How can I verify Mychi Thi Nguyen, M.D.'s license?
NPPES lists California license number A103314, 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 Mychi Thi Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Mychi Thi Nguyen, M.D. had 2,808 Medicare Part D claims for 194 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.