IndividualActive
Mark Naas, PSY
NPI 1427156850 · Psychologist · Oakland, CA
Mark Naas, PSY is a Psychologist provider in Oakland, CA (NPI 1427156850).
Provider details
- NPI number
- 1427156850
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY
- Sex
- Male
- Sole proprietor
- Yes
- License
- PSY19156 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
3873 Piedmont Ave Ste 2
Oakland, CA 94611-5367
Phone: (925) 203-5810
Street-level locationGet directions
Mailing address
195 41st Street
Oakland, CA 94611
Registry dates
- Enumerated
- 2006-09-20
- Last updated
- 2024-03-14
- Certified
- 2024-03-14
Frequently asked questions
- What is Mark Naas's NPI number?
- Mark Naas's National Provider Identifier (NPI) is 1427156850, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Naas's specialty?
- Mark Naas is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Mark Naas located?
- Mark Naas's practice location on file with NPPES is 3873 Piedmont Ave Ste 2, Oakland, CA 94611-5367.
- What is Mark Naas's phone number?
- The practice phone number listed in the NPPES registry for Mark Naas is (925) 203-5810.
- Is Mark Naas's NPI active?
- Yes — Mark Naas's NPI (1427156850) is active in the NPPES registry as of the last update on 2024-03-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.