NPPES file of Aug 9, 2026

William W. Wu, M.D., PH.D.

Anatomic Pathology & Clinical Pathology Physician · Ontario, CA

William W. Wu, M.D., PH.D. is an anatomic pathology & clinical pathology physician with a practice address in Ontario, California, and NPI 1720370109, issued on May 4, 2011. Check the license (California A116068, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1720370109
Name
William W. Wu
Credential
M.D., PH.D.
Primary taxonomy
Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
License numbers
A116068 CA
267829 NY
Self-reported in NPPES; status is on the state search
Practice location
2295 S Vineyard Ave, Ontario, CA 91761
Phone
(909) 724-3530
Enumerated
May 4, 2011
Record last updated
Apr 14, 2022
Fax
(909) 724-3535
Medicare enrollment
Enrolled (PECOS I20150828002247); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest anatomic pathology & clinical pathology physician records → All 1,554 in California → Look up another NPI →

Also registered at 2295 S Vineyard Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ana Mae Abaya, NPFamily Nurse Practitioner1255164943
  2. Sheila Marie Adan, D.O.Family Medicine Physician1912272733
  3. Anna Alley, CRNACertified Registered Nurse Anesthetist1518399732
  4. Hye Hyun An, PHARMDPharmacist1578428470
  5. Leonila Araneta, LCSWClinical Social Worker1861771974
  6. Fernando AvilaFamily Medicine Physician1396364147

Verify William W. Wu in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A116068    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Southern California Permanente Medical GroupVictorville, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

William W. Wu among 1,554 anatomic pathology & clinical pathology physician records in California

William W. Wu, M.D., PH.D. is one of 1,554 anatomic pathology & clinical pathology physician records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 70% of them.

  • NPI issued2011 · 70% of these records are older, 27% newer
  • In a Medicare fileYes · 65% of these records are
  • In the CMS Doctors and Clinicians fileYes · 57% of these records are
  • Graduated2008 · median 2003 among the 891 with a school on file
  • Record last updated2022 · 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 207ZP0102X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Anatomic Pathology & Clinical Pathology Physician providers in California

There are 1,554 anatomic pathology & clinical pathology physician records in California.

All 1,554 in California → Every provider in Ontario → Anatomic Pathology & Clinical Pathology Physician nationwide →

The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes

  1. Gayle Lucas, M.D.Diamond Bar, CA 917651659563476
  2. Catherine Chang-Suen, D.O.Pomona, CA 917671205201621
  3. David Nasca, M.D.Pomona, CA 917671508887969
  4. Victor Santiago, MDPomona, CA 917671851711568
  5. Philip Strassle, MDPomona, CA 917671952320699
  6. Nancy Wu, M.D.Pomona, CA 917671609895358
  7. Kim Dickinson, MDMonterey Park, CA 917541326008723
  8. Hao Nguyen, MDPomona, CA 917681407046659

Common questions

What is William W. Wu, M.D., PH.D.'s NPI number?

William W. Wu, M.D., PH.D.'s National Provider Identifier (NPI) is 1720370109, issued on May 4, 2011. An NPI identifies a provider in billing; it is not a license.

Where is William W. Wu, M.D., PH.D. located?

The NPPES record lists a practice address at 2295 S Vineyard Ave, Ontario, CA, 91761. Phone: (909) 724-3530. Providers update this record themselves, so call before visiting.

How can I verify William W. Wu, M.D., PH.D.'s license?

NPPES lists California license number A116068, 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.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.