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Daniel Volk, PHD
NPI 1659342590 · Clinical Psychologist · Mill Valley, CA
Daniel Volk, PHD is a Clinical Psychologist provider in Mill Valley, CA (NPI 1659342590).
Provider details
- NPI number
- 1659342590
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- PSY8948 (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
6 Knoll Ln
Suite F
Mill Valley, CA 94941-2326
Phone: (415) 389-0235
Fax: (510) 521-8253
Street-level locationGet directions
Mailing address
57 Montford Ave
Mill Valley, CA 94941-3335
Registry dates
- Enumerated
- 2006-01-30
- Last updated
- 2008-03-20
Frequently asked questions
- What is Daniel Volk's NPI number?
- Daniel Volk's National Provider Identifier (NPI) is 1659342590, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Daniel Volk's specialty?
- Daniel Volk is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Daniel Volk located?
- Daniel Volk's practice location on file with NPPES is 6 Knoll Ln, Mill Valley, CA 94941-2326.
- What is Daniel Volk's phone number?
- The practice phone number listed in the NPPES registry for Daniel Volk is (415) 389-0235.
- Is Daniel Volk's NPI active?
- Yes — Daniel Volk's NPI (1659342590) is active in the NPPES registry as of the last update on 2008-03-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.