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David Sitzer, PH.D.
NPI 1619091253 · Psychologist · Palo Alto, CA
David Sitzer, PH.D. is a Psychologist provider in Palo Alto, CA (NPI 1619091253).
Provider details
- NPI number
- 1619091253
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- PSY 13538 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(89/100 index)
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
667 Lytton Ave
Palo Alto, CA 94301-1335
Phone: (650) 269-0657
Street-level locationGet directions
Mailing address
375 Cambridge Ave
Palo Alto, CA 94306-1613
Registry dates
- Enumerated
- 2007-03-19
- Last updated
- 2025-07-18
- Certified
- 2020-08-31
Frequently asked questions
- What is David Sitzer's NPI number?
- David Sitzer's National Provider Identifier (NPI) is 1619091253, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Sitzer's specialty?
- David Sitzer is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is David Sitzer located?
- David Sitzer's practice location on file with NPPES is 667 Lytton Ave, Palo Alto, CA 94301-1335.
- What is David Sitzer's phone number?
- The practice phone number listed in the NPPES registry for David Sitzer is (650) 269-0657.
- Is David Sitzer's NPI active?
- Yes — David Sitzer's NPI (1619091253) is active in the NPPES registry as of the last update on 2025-07-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.