Wu & Diaz Professional Corp
NPI 1548356884 · Family Medicine Physician · Ontario, CA
Wu & Diaz Professional Corp is a Family Medicine Physician organization in Ontario, CA (NPI 1548356884).
Provider details
- NPI number
- 1548356884
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Jack Wu, Secretary(909) 773-0022
- License
- A69486 (CA)
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 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.
Practice location
Mailing address
Other names (DBA / former)
- Doing business as
- Care First Medical Group Inc
Registry dates
- Enumerated
- 2006-10-05
- Last updated
- 2025-09-11
Frequently asked questions
- What is Wu & Diaz Professional Corp's NPI number?
- Wu & Diaz Professional Corp's National Provider Identifier (NPI) is 1548356884, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Wu & Diaz Professional Corp?
- Wu & Diaz Professional Corp is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Wu & Diaz Professional Corp located?
- Wu & Diaz Professional Corp's practice location on file with NPPES is 3550 E Philadelphia Street, Ontario, CA 91761.
- What is Wu & Diaz Professional Corp's phone number?
- The practice phone number listed in the NPPES registry for Wu & Diaz Professional Corp is (909) 773-0022.
- Who is the authorized official for Wu & Diaz Professional Corp?
- The authorized official listed on Wu & Diaz Professional Corp's NPPES record is Jack Wu, Secretary. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Wu & Diaz Professional Corp's NPI active?
- Yes — Wu & Diaz Professional Corp's NPI (1548356884) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.