William Williamson
NPI 1174953400 · Rehabilitation Practitioner · Commerce, CA
William Williamson is a Rehabilitation Practitioner provider in Commerce, CA (NPI 1174953400).
Provider details
- NPI number
- 1174953400
- Entity type
- Individual
- Primary specialty
- Rehabilitation PractitionerRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2013-11-22
- Last updated
- 2013-11-22
Frequently asked questions
- What is William Williamson's NPI number?
- William Williamson's National Provider Identifier (NPI) is 1174953400, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Williamson's specialty?
- William Williamson is listed in the NPPES registry with a primary specialty of Rehabilitation Practitioner (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is William Williamson located?
- William Williamson's practice location on file with NPPES is 6055 E Washington Blvd, Commerce, CA 90040-2449.
- What is William Williamson's phone number?
- The practice phone number listed in the NPPES registry for William Williamson is (323) 346-0960.
- Is William Williamson's NPI active?
- Yes — William Williamson's NPI (1174953400) is active in the NPPES registry as of the last update on 2013-11-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.