Joy Williamson
NPI 1891587812 · Clinical Exercise Physiologist · San Mateo, CA
Joy Williamson is a Clinical Exercise Physiologist provider in San Mateo, CA (NPI 1891587812).
Provider details
- NPI number
- 1891587812
- Entity type
- Individual
- Primary specialty
- Clinical Exercise PhysiologistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Sex
- Female
- 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
1 yr 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
- 2025-05-19
- Last updated
- 2025-05-19
- Certified
- 2025-05-19
Frequently asked questions
- What is Joy Williamson's NPI number?
- Joy Williamson's National Provider Identifier (NPI) is 1891587812, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joy Williamson's specialty?
- Joy Williamson is listed in the NPPES registry with a primary specialty of Clinical Exercise Physiologist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is Joy Williamson located?
- Joy Williamson's practice location on file with NPPES is 3050 S Delaware St Ste 130, San Mateo, CA 94403-2394.
- What is Joy Williamson's phone number?
- The practice phone number listed in the NPPES registry for Joy Williamson is (650) 319-8654.
- Is Joy Williamson's NPI active?
- Yes — Joy Williamson's NPI (1891587812) is active in the NPPES registry as of the last update on 2025-05-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.