Joseph Simon Ou
Family Medicine Physician · Oakland, CA
Joseph Simon Ou is a family medicine physician with a practice address in Oakland, California, and NPI 1477084382, issued on Mar 22, 2017. Check the license (California 20A18203, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph Simon Ou
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A18203 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1800 Harrison St FL 7, Oakland, CA 94612
- Phone
- (510) 625-5356
- Enumerated
- Mar 22, 2017
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20201214001808); accepts Medicare assignment
- 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 1800 Harrison St FL 7
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joseph Simon Ou in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A18203Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% fewer Medicare Part D claims than the average family medicine physician in 2024
3,395 Medicare Part D claims for 517 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 160 claims were for opioids.
Most prescribed
- Atorvastatin Calcium277 claims
- Amlodipine Besylate217 claims
- Albuterol Sulfate Hfa142 claims
- Losartan Potassium140 claims
- Lisinopril131 claims
- Hydrocodone-Acetaminophen104 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 IncVallejo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Simon Ou among 17,133 family medicine physician records in California
Joseph Simon Ou 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 2017, is newer than 79% of them.
- NPI issued2017 · 79% of these records are older, 18% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2017 · median 2005 among the 10,652 with a school on file
- Record last updated2021 · 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).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Oakland → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Shirley Cachola, MDOakland, CA 946121255403077
- Francisco Javier Diaz Diaz, M.D.Oakland, CA 946121497946313
- Richard Fury, MDOakland, CA 946121548349681
- Mark Lin, M.D.Oakland, CA 946121518252816
- Lesley Lindley, DOOakland, CA 946121740466945
- Thiennga Nguyen, M.D.Oakland, CA 946121366624892
- Rujeko Nyachoto, M.D.Oakland, CA 946121629154760
- Nina Patel, M.D.Oakland, CA 946121548556707
Common questions
What is Joseph Simon Ou's NPI number?
Joseph Simon Ou's National Provider Identifier (NPI) is 1477084382, issued on Mar 22, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Simon Ou located?
The NPPES record lists a practice address at 1800 Harrison St FL 7, Oakland, CA, 94612. Phone: (510) 625-5356. Providers update this record themselves, so call before visiting.
How can I verify Joseph Simon Ou's license?
NPPES lists California license number 20A18203, 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 Joseph Simon Ou prescribe under Medicare Part D?
In 2024, Joseph Simon Ou had 3,395 Medicare Part D claims for 517 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.