Mari Sian Davies, PHD
Clinical Neuropsychologist · Marina Del Rey, CA
Mari Sian Davies, PHD is a clinical neuropsychologist with a practice address in Marina Del Rey, California, and NPI 1104198514, issued on Jan 31, 2012. Check the license (California 24383PSY, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mari Sian Davies
- Credential
- PHD
- Primary taxonomy
- Clinical Neuropsychologist 103G00000X
- License number
- 24383PSY CA
Self-reported in NPPES; status is on the state search - Practice location
- 4640 Admiralty Way, Marina Del Rey, CA 90292
- Phone
- (650) 479-6609
- Enumerated
- Jan 31, 2012
- Record last updated
- Aug 21, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 4640 Admiralty Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Katherine Boswell, MFTMarriage & Family Therapist1114178852
- David Chang, M.D.Orthopaedic Surgery of the Spine Physician1467575472
- Tina Crowe, MSWClinical Social Worker1760528053
- Stephanie Francis, MA, LMFTMarriage & Family Therapist1558794826
Verify Mari Sian Davies in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 24383PSYCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Clinical Neuropsychologist providers in California
There are 743 clinical neuropsychologist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other clinical neuropsychologist records in California
- Richard Abbey, PH.D.Palo Alto, CA1730377649
- Jennifer Acogny, PSY.D.Beverly Hills, CA1841707643
- Jennifer Adler, PHDSan Diego, CA1164314753
- Kristina Agbayani, PH.D.Palo Alto, CA1174974125
- Maral AghvinianLos Angeles, CA1588545685
- Cynthia Aguilar, PSY.DLos Angeles, CA1114474699
- Charles AhernCarmel, CA1083336200
- Natacha Akshoomoff, PH.D.San Diego, CA1740315043
- Lori Alasantro, PHDCarlsbad, CA1669807111
- Kimberly Alfano, PHDSanta Barbara, CA1326068115
Common questions
What is Mari Sian Davies, PHD's NPI number?
Mari Sian Davies, PHD's National Provider Identifier (NPI) is 1104198514, issued on Jan 31, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Mari Sian Davies, PHD located?
The NPPES record lists a practice address at 4640 Admiralty Way, Marina Del Rey, CA, 90292. Phone: (650) 479-6609. Providers update this record themselves, so call before visiting.
How can I verify Mari Sian Davies, PHD's license?
NPPES lists California license number 24383PSY, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.