Russell Llewellyn, PH. D.
NPI 1942334578 · Clinical Psychologist · San Carlos, CA
Russell Llewellyn, PH. D. is a Clinical Psychologist provider in San Carlos, CA (NPI 1942334578).
Provider details
- NPI number
- 1942334578
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH. D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- PSY4609 (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
- 2007-03-15
- Last updated
- 2007-07-08
Frequently asked questions
- What is Russell Llewellyn's NPI number?
- Russell Llewellyn's National Provider Identifier (NPI) is 1942334578, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Russell Llewellyn's specialty?
- Russell Llewellyn is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Russell Llewellyn located?
- Russell Llewellyn's practice location on file with NPPES is 1350 Cherry St, San Carlos, CA 94070-3008.
- What is Russell Llewellyn's phone number?
- The practice phone number listed in the NPPES registry for Russell Llewellyn is (650) 595-4500.
- Is Russell Llewellyn's NPI active?
- Yes — Russell Llewellyn's NPI (1942334578) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.