William Visser, MD
NPI 1811045768 · Family Medicine Physician · Baldwin Park, CA
William Visser, MD is a Family Medicine Physician provider in Baldwin Park, CA (NPI 1811045768).
Provider details
- NPI number
- 1811045768
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A26565 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-08
- Last updated
- 2007-11-29
Frequently asked questions
- What is William Visser's NPI number?
- William Visser's National Provider Identifier (NPI) is 1811045768, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Visser's specialty?
- William Visser is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Visser located?
- William Visser's practice location on file with NPPES is 1011 Baldwin Park Blvd, Baldwin Park, CA 91706-5806.
- What is William Visser's phone number?
- The practice phone number listed in the NPPES registry for William Visser is (626) 851-1011.
- Is William Visser's NPI active?
- Yes — William Visser's NPI (1811045768) is active in the NPPES registry as of the last update on 2007-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.