William Wu, M.D., PH.D.
NPI 1720370109 · Anatomic Pathology & Clinical Pathology Physician · Ontario, CA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Wu, M.D., PH.D. is a Anatomic Pathology & Clinical Pathology Physician provider in Ontario, CA (NPI 1720370109).
Provider details
- NPI number
- 1720370109
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 267829 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
701 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Blood Creatinine Level82565 | 108 | $5 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 72 | $8 |
| Bilirubin Level, Total82247 | 71 | $5 |
| Blood Test Panel for Electrolytes (sodium Potassium, Chloride, Carbon Dioxide)80051 | 70 | $7 |
| Liver Enzyme (sgpt), Level84460 | 61 | $5 |
| Phosphatase (enzyme) Level, Alkaline84075 | 56 | $5 |
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity |
Practice location
Mailing address
Additional practice locations (1)
- 9961 Sierra AveFontana, CA 92335-6720Phone: (909) 302-8488Fax: (909) 302-8470
Registry dates
- Enumerated
- 2011-05-04
- Last updated
- 2022-04-14
- Certified
- 2022-04-14
Frequently asked questions
- What is William Wu's NPI number?
- William Wu's National Provider Identifier (NPI) is 1720370109, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Wu's specialty?
- William Wu is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is William Wu located?
- William Wu's practice location on file with NPPES is 2295 S Vineyard Ave, Ontario, CA 91761-7925.
- What is William Wu's phone number?
- The practice phone number listed in the NPPES registry for William Wu is (909) 724-3530.
- Does William Wu accept Medicare?
- William Wu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Wu's NPI active?
- Yes — William Wu's NPI (1720370109) is active in the NPPES registry as of the last update on 2022-04-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.