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Stephen Werk, PHD
NPI 1306898796 · Psychologist · San Jose, CA
Stephen Werk, PHD is a Psychologist provider in San Jose, CA (NPI 1306898796).
Provider details
- NPI number
- 1306898796
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- License
- PSY11078 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
3500 Zanker Road
San Jose, CA 95134-2299
Phone: (408) 451-6198
Street-level locationGet directions
Mailing address
1600 9th St
Sacramento, CA 95814-6414
Registry dates
- Enumerated
- 2006-05-16
- Last updated
- 2007-07-08
Frequently asked questions
- What is Stephen Werk's NPI number?
- Stephen Werk's National Provider Identifier (NPI) is 1306898796, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Werk's specialty?
- Stephen Werk is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Stephen Werk located?
- Stephen Werk's practice location on file with NPPES is 3500 Zanker Road, San Jose, CA 95134-2299.
- What is Stephen Werk's phone number?
- The practice phone number listed in the NPPES registry for Stephen Werk is (408) 451-6198.
- Is Stephen Werk's NPI active?
- Yes — Stephen Werk's NPI (1306898796) 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.