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John Ruark, M. D.
NPI 1235294968 · Psychiatry Physician · Menlo Park, CA
John Ruark, M. D. is a Psychiatry Physician provider in Menlo Park, CA (NPI 1235294968).
Provider details
- NPI number
- 1235294968
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M. D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G50171 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 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
885 Oak Grove Ave
Suite 301
Menlo Park, CA 94025-4433
Phone: (650) 327-7100
Fax: (650) 327-1420
Street-level locationGet directions
Mailing address
885 Oak Grove Avenue
Menlo Park, CA 94025
Registry dates
- Enumerated
- 2006-12-22
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Ruark's NPI number?
- John Ruark's National Provider Identifier (NPI) is 1235294968, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Ruark's specialty?
- John Ruark is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is John Ruark located?
- John Ruark's practice location on file with NPPES is 885 Oak Grove Ave, Menlo Park, CA 94025-4433.
- What is John Ruark's phone number?
- The practice phone number listed in the NPPES registry for John Ruark is (650) 327-7100.
- Is John Ruark's NPI active?
- Yes — John Ruark's NPI (1235294968) 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.