William Keith Marek, PH.D.
Psychologist · San Ramon, CA
William Keith Marek, PH.D. is a psychologist with a practice address in San Ramon, California, and NPI 1851560544, issued on Feb 27, 2008. Check the license (California PSY 14791, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Keith Marek
- Credential
- PH.D.
- Primary taxonomy
- Psychologist 103T00000X
- License number
- PSY 14791 CA
Self-reported in NPPES; status is on the state search - Practice location
- 105 Reflections Dr, San Ramon, CA 94583
- Phone
- (925) 275-0294
- Enumerated
- Feb 27, 2008
- Record last updated
- Feb 27, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (925) 426-0094
- Medicare enrollment
- Enrolled (PECOS I20080506000735); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Verify William Keith Marek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PSY 14791Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Sud Specialty Group - CASanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Psychologist providers in California
There are 7,304 psychologist records in California.
Other psychologist records in California
- Alice Abarbanel, PH.D.Albany, CA1598095002
- Michael Abbott, PSYDModesto, CA1346498151
- Riley AbelesLos Angeles, CA1841861945
- Jenna Abell, PSYDLos Angeles, CA1073743969
- Sheri Abercrombie, PSY.D.San Diego, CA1932292422
- Tseday Aberra, PSY.D.Corona, CA1104026517
- Elham Abouhamzeh, PSY.DIrvine, CA1386092880
- Lilit Abraamyan-ChaidezBurbank, CA1710433289
- Mackenzie Abraham, PHDRedondo Beach, CA1881053833
- Sandra Abraham, PSYDSanta Fe Springs, CA1427467851
Common questions
What is William Keith Marek, PH.D.'s NPI number?
William Keith Marek, PH.D.'s National Provider Identifier (NPI) is 1851560544, issued on Feb 27, 2008. An NPI identifies a provider in billing; it is not a license.
Where is William Keith Marek, PH.D. located?
The NPPES record lists a practice address at 105 Reflections Dr, San Ramon, CA, 94583. Phone: (925) 275-0294. Providers update this record themselves, so call before visiting.
How can I verify William Keith Marek, PH.D.'s license?
NPPES lists California license number PSY 14791, 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. Medicare files from data.cms.gov. 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.