William Chenwei Wu, D.O.
Emergency Medicine Physician · Sonora, CA
William Chenwei Wu, D.O. is an emergency medicine physician with a practice address in Sonora, California, and NPI 1558567826, issued on Jun 25, 2007. Check the license (California 20A-10610, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Chenwei Wu
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 20A-10610 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Greenley RD, Sonora, CA 95370
- Phone
- (209) 263-0803
- Enumerated
- Jun 25, 2007
- Record last updated
- Dec 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1000 Greenley RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Penny Ablin, M.D.Emergency Medicine Physician1861486813
- Andrew Addley, CRNACertified Registered Nurse Anesthetist1356976724
- Masoud AhmadzaiPharmacist1417520727
- Mary Allard, PHARMDPharmacist1013854371
- Arturo Alvarez Antezana, MDInternal Medicine Physician1457847154
- Charles Black, D.O.Orthopaedic Surgery Physician1790988087
Verify William Chenwei Wu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A-10610Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% more Medicare Part D claims than the average emergency medicine physician in 2024
371 Medicare Part D claims for 181 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 41 claims were for opioids.
Most prescribed
- Ondansetron Odt90 claims
- Morphine Sulfate38 claims
- Naloxone Hcl33 claims
- Meloxicam31 claims
- Sulfamethoxazole-Trimethoprim29 claims
- Ciprofloxacin Hcl16 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.
William Chenwei Wu among 7,751 emergency medicine physician records in California
William Chenwei Wu, D.O. is one of 7,751 emergency 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 40% of them.
- NPI issued2007 · 40% of these records are older, 50% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 emergency medicine physician records list a practice address in Sonora
They are 14 of the 629 NPPES records with a practice address in Sonora, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Sonora → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Penny Ablin, M.D.Sonora, CA 953701861486813
- William Bowie, M.D.Sonora, CA 953701578537932
- Blake Cleveland, M.D.Sonora, CA 953701124311253
- Donald Dudley, M.D.Sonora, CA 953701497727952
- Michael Forster, MDSonora, CA 953701821101577
- Ron Hood, MDSonora, CA 953701730292483
- Steven Joye, DOSonora, CA 953701497916498
- Donald Klatt, M.D.Sonora, CA 953701902878556
Common questions
What is William Chenwei Wu, D.O.'s NPI number?
William Chenwei Wu, D.O.'s National Provider Identifier (NPI) is 1558567826, issued on Jun 25, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William Chenwei Wu, D.O. located?
The NPPES record lists a practice address at 1000 Greenley RD, Sonora, CA, 95370. Phone: (209) 263-0803. Providers update this record themselves, so call before visiting.
How can I verify William Chenwei Wu, D.O.'s license?
NPPES lists California license number 20A-10610, 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 William Chenwei Wu, D.O. prescribe under Medicare Part D?
In 2024, William Chenwei Wu, D.O. had 371 Medicare Part D claims for 181 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.