NPPES file of Aug 9, 2026

Mark Phuoc Nguyen, PSY.D

Clinical Psychologist · San Francisco, CA

Mark Phuoc Nguyen, PSY.D is a clinical psychologist with a practice address in San Francisco, California, and NPI 1891044640, issued on Sep 6, 2012. Check the license (California PSY29174, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1891044640
Name
Mark Phuoc Nguyen
Credential
PSY.D
Primary taxonomy
Clinical Psychologist 103TC0700X
License number
PSY29174 CA
Self-reported in NPPES; status is on the state search
Practice location
1 Embarcadero Ctr Ste 1900, San Francisco, CA 94111
Phone
(888) 663-6331
Enumerated
Sep 6, 2012
Record last updated
Aug 29, 2024
Medicare enrollment
Enrolled (PECOS I20180507002292); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest clinical psychologist records → All 12,647 in California → Look up another NPI →

Also registered at 1 Embarcadero Ctr Ste 1900

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Bodhi Anderson, PACPhysician Assistant1730384942
  2. Brittany Bailey, APRNFamily Nurse Practitioner1558735241
  3. Mira Brahmbhatt, PA-CPhysician Assistant1891348165
  4. Cheryl Butler, PA-CPhysician Assistant1306248687
  5. Shawn Casey, NBC-HWCHealth Educator1770104150
  6. Catherine Ciano, PH.D.Clinical Psychologist1649636895

Verify Mark Phuoc Nguyen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license PSY29174    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. One Medical Group IncSan Francisco, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Mark Phuoc Nguyen among 12,647 clinical psychologist records in California

Mark Phuoc Nguyen, PSY.D is one of 12,647 clinical psychologist records with a practice address in California. 9% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 63% of them.

  • NPI issued2012 · 63% of these records are older, 33% newer
  • In a Medicare fileYes · 9% of these records are
  • In the CMS Doctors and Clinicians fileYes · 19% of these records are
  • Graduated2014 · median 2006 among the 2,424 with a school on file
  • Record last updated2024 · 63% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

802 clinical psychologist records list a practice address in San Francisco

They are 802 of the 38,143 NPPES records with a practice address in San Francisco, and 12,647 clinical psychologist records in California.

All 12,647 in California → Every provider in San Francisco → Clinical Psychologist nationwide →

The 8 clinical psychologist records with the nearest ZIP codes

  1. Christine ChoeSan Francisco, CA 941111457122103
  2. Catherine Ciano, PH.D.San Francisco, CA 941111649636895
  3. Efren Hilera, PSY.D.San Francisco, CA 941111275598401
  4. James Lee, PSY.D.San Francisco, CA 941111730597808
  5. Chad LejeuneSan Francisco, CA 941111710343090
  6. Tracy Lewellen, PSY.D.San Francisco, CA 941111356741672
  7. Yi-Xian LiSan Francisco, CA 941111134659311
  8. Jenica OtteroSan Francisco, CA 941111467089003

Common questions

What is Mark Phuoc Nguyen, PSY.D's NPI number?

Mark Phuoc Nguyen, PSY.D's National Provider Identifier (NPI) is 1891044640, issued on Sep 6, 2012. An NPI identifies a provider in billing; it is not a license.

Where is Mark Phuoc Nguyen, PSY.D located?

The NPPES record lists a practice address at 1 Embarcadero Ctr Ste 1900, San Francisco, CA, 94111. Phone: (888) 663-6331. Providers update this record themselves, so call before visiting.

How can I verify Mark Phuoc Nguyen, PSY.D's license?

NPPES lists California license number PSY29174, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.