Francisco Javier Diaz Diaz, M.D.
Family Medicine Physician · Oakland, CA
Francisco Javier Diaz Diaz, M.D. is a family medicine physician with a practice address in Oakland, California, and NPI 1497946313, issued on Aug 6, 2007. Check the license (California C146564, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Francisco Javier Diaz Diaz
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- C146564 CA
MD038207 DC
257688 MA
MD60041376 WA
MED5708 ZZ
Self-reported in NPPES; status is on the state search - Practice location
- 2121 Harrison St Ste 110, Oakland, CA 94612
- Phone
- (510) 587-3000
- Enumerated
- Aug 6, 2007
- Record last updated
- Mar 19, 2018 (not updated in 8 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Francisco Javier Diaz Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C146564Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
29 Medicare Part D claims, against an average of 3,544 among the 117,163 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.
Francisco Javier Diaz Diaz among 17,133 family medicine physician records in California
Francisco Javier Diaz Diaz, M.D. 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 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2018 · 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
- 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
- Joe Selby, MDOakland, CA 946121790859023
Common questions
What is Francisco Javier Diaz Diaz, M.D.'s NPI number?
Francisco Javier Diaz Diaz, M.D.'s National Provider Identifier (NPI) is 1497946313, issued on Aug 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Francisco Javier Diaz Diaz, M.D. located?
The NPPES record lists a practice address at 2121 Harrison St Ste 110, Oakland, CA, 94612. Phone: (510) 587-3000. Providers update this record themselves, so call before visiting.
How can I verify Francisco Javier Diaz Diaz, M.D.'s license?
NPPES lists California license number C146564, 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 Francisco Javier Diaz Diaz, M.D. prescribe under Medicare Part D?
In 2024, Francisco Javier Diaz Diaz, M.D. had 29 Medicare Part D claims; 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.