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Aya Williams, PHD
NPI 1568254829 · Clinical Psychologist · San Mateo, CA
Aya Williams, PHD is a Clinical Psychologist provider in San Mateo, CA (NPI 1568254829).
Provider details
- NPI number
- 1568254829
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 35656 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(54/100 index)
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
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
100 S Ellsworth Ave Ste 802
San Mateo, CA 94401-3926
Phone: (650) 822-1095
Street-level locationGet directions
Mailing address
455 El Camino Real Rm 127
Santa Clara, CA 95050-4377
Registry dates
- Enumerated
- 2025-05-21
- Last updated
- 2025-05-21
- Certified
- 2025-05-21
Frequently asked questions
- What is Aya Williams's NPI number?
- Aya Williams's National Provider Identifier (NPI) is 1568254829, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Aya Williams's specialty?
- Aya Williams is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Aya Williams located?
- Aya Williams's practice location on file with NPPES is 100 S Ellsworth Ave Ste 802, San Mateo, CA 94401-3926.
- What is Aya Williams's phone number?
- The practice phone number listed in the NPPES registry for Aya Williams is (650) 822-1095.
- Is Aya Williams's NPI active?
- Yes — Aya Williams's NPI (1568254829) is active in the NPPES registry as of the last update on 2025-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.