William Hopper, MD
NPI 1447439765 · Occupational Medicine Physician · Oakland, CA
William Hopper, MD is a Occupational Medicine Physician provider in Oakland, CA (NPI 1447439765).
Provider details
- NPI number
- 1447439765
- Entity type
- Individual
- Primary specialty
- Occupational Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20701 (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
18 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
Registry dates
- Enumerated
- 2007-11-02
- Last updated
- 2007-11-02
Frequently asked questions
- What is William Hopper's NPI number?
- William Hopper's National Provider Identifier (NPI) is 1447439765, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Hopper's specialty?
- William Hopper is listed in the NPPES registry with a primary specialty of Occupational Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Hopper located?
- William Hopper's practice location on file with NPPES is 384 Embarcadero W, Oakland, CA 94607-3731.
- What is William Hopper's phone number?
- The practice phone number listed in the NPPES registry for William Hopper is (510) 465-9810.
- Is William Hopper's NPI active?
- Yes — William Hopper's NPI (1447439765) is active in the NPPES registry as of the last update on 2007-11-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.