Wei (wendy) Diao, MD
Family Medicine Physician · Oakland, CA
Wei (wendy) Diao, MD is a family medicine physician with a practice address in Oakland, California, and NPI 1568849743, issued on Apr 27, 2015. Check the license (California A144291, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Wei (wendy) Diao
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A144291 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1800 Harrison St FL 9TH, Oakland, CA 94612
- Phone
- (510) 625-6600
- Enumerated
- Apr 27, 2015
- Record last updated
- Feb 11, 2022
- Medicare enrollment
- Enrolled (PECOS I20190226001230); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 2015
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Wei (wendy) Diao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A144291Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% fewer Medicare Part D claims than the average family medicine physician in 2024
1,144 Medicare Part D claims for 153 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 41 claims were for opioids.
Most prescribed
- Atorvastatin Calcium143 claims
- Losartan Potassium79 claims
- Amlodipine Besylate47 claims
- Hydrochlorothiazide35 claims
- Levothyroxine Sodium35 claims
- Alendronate Sodium33 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 IncSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Wei (wendy) Diao among 17,133 family medicine physician records in California
Wei (wendy) Diao, MD 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 2015, is newer than 74% of them.
- NPI issued2015 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2015 · median 2005 among the 10,652 with a school on file
- Record last updated2022 · 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 Wei (wendy) Diao, MD's NPI number?
Wei (wendy) Diao, MD's National Provider Identifier (NPI) is 1568849743, issued on Apr 27, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Wei (wendy) Diao, MD located?
The NPPES record lists a practice address at 1800 Harrison St FL 9TH, Oakland, CA, 94612. Phone: (510) 625-6600. Providers update this record themselves, so call before visiting.
How can I verify Wei (wendy) Diao, MD's license?
NPPES lists California license number A144291, 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 Wei (wendy) Diao, MD prescribe under Medicare Part D?
In 2024, Wei (wendy) Diao, MD had 1,144 Medicare Part D claims for 153 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.