Phyllis Williamson, PH.D.
NPI 1477634087 · Clinical Psychologist · Sacramento, CA
Phyllis Williamson, PH.D. is a Clinical Psychologist provider in Sacramento, CA (NPI 1477634087).
Provider details
- NPI number
- 1477634087
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- PSY12550 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
- 2006-10-18
- Last updated
- 2010-12-09
Frequently asked questions
- What is Phyllis Williamson's NPI number?
- Phyllis Williamson's National Provider Identifier (NPI) is 1477634087, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Phyllis Williamson's specialty?
- Phyllis Williamson is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Phyllis Williamson located?
- Phyllis Williamson's practice location on file with NPPES is 2609 Capitol Ave Ste 6, Sacramento, CA 95816-5904.
- What is Phyllis Williamson's phone number?
- The practice phone number listed in the NPPES registry for Phyllis Williamson is (916) 955-0670.
- Is Phyllis Williamson's NPI active?
- Yes — Phyllis Williamson's NPI (1477634087) is active in the NPPES registry as of the last update on 2010-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.