William Wu, D.O.
NPI 1558567826 · Emergency Medicine Physician · Sonora, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Wu, D.O. is a Emergency Medicine Physician provider in Sonora, CA (NPI 1558567826).
Provider details
- NPI number
- 1558567826
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 20A-10610 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 90 | 90 |
| Morphine Sulfate | 38 | 38 |
| Naloxone Hcl | 33 | 33 |
| Meloxicam | 31 | 31 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 29 | 29 |
| Ciprofloxacin Hcl | 16 | 16 |
| Ibuprofen | 14 | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-25
- Last updated
- 2021-12-03
Frequently asked questions
- What is William Wu's NPI number?
- William Wu's National Provider Identifier (NPI) is 1558567826, 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 Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Wu located?
- William Wu's practice location on file with NPPES is 1000 Greenley Rd, Sonora, CA 95370-5200.
- What is William Wu's phone number?
- The practice phone number listed in the NPPES registry for William Wu is (209) 263-0803.
- 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 (1558567826) is active in the NPPES registry as of the last update on 2021-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.