Karen Williams, PH.D.
NPI 1619004173 · Clinical Psychologist · Rancho Cucamonga, CA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Williams, PH.D. is a Clinical Psychologist provider in Rancho Cucamonga, CA (NPI 1619004173).
Provider details
- NPI number
- 1619004173
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Female
- Sole proprietor
- No
- License
- PSY12198 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
- 2007-02-28
- Last updated
- 2023-04-26
- Certified
- 2023-04-26
Frequently asked questions
- What is Karen Williams's NPI number?
- Karen Williams's National Provider Identifier (NPI) is 1619004173, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Williams's specialty?
- Karen Williams is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Karen Williams located?
- Karen Williams's practice location on file with NPPES is 10737 Laurel St Ste 230, Rancho Cucamonga, CA 91730-7659.
- What is Karen Williams's phone number?
- The practice phone number listed in the NPPES registry for Karen Williams is (909) 989-5556.
- Does Karen Williams accept Medicare?
- Karen Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Williams's NPI active?
- Yes — Karen Williams's NPI (1619004173) is active in the NPPES registry as of the last update on 2023-04-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.