Tracy Williamson
NPI 1285834424 · Clinical Psychologist · Irvine, CA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tracy Williamson is a Clinical Psychologist provider in Irvine, CA (NPI 1285834424).
Provider details
- NPI number
- 1285834424
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- PSY18060 (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
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 4199 Campus DrSte. 200Irvine, CA 92612-4684Phone: (949) 510-9014
Registry dates
- Enumerated
- 2007-07-24
- Last updated
- 2018-03-17
Frequently asked questions
- What is Tracy Williamson's NPI number?
- Tracy Williamson's National Provider Identifier (NPI) is 1285834424, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tracy Williamson's specialty?
- Tracy Williamson is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Tracy Williamson located?
- Tracy Williamson's practice location on file with NPPES is 300 Spectrum Dr., Irvine, CA 92618.
- What is Tracy Williamson's phone number?
- The practice phone number listed in the NPPES registry for Tracy Williamson is (949) 201-9147.
- Does Tracy Williamson accept Medicare?
- Tracy Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tracy Williamson's NPI active?
- Yes — Tracy Williamson's NPI (1285834424) is active in the NPPES registry as of the last update on 2018-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.