NPPES file of Aug 9, 2026

Thinh Duy Mai, MD

Psychiatry Physician · Los Gatos, CA

Thinh Duy Mai, MD is a psychiatry physician with a practice address in Los Gatos, California, and NPI 1558505750, issued on May 1, 2009. Check the license (California A107289, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1558505750
Name
Thinh Duy Mai
Credential
MD
Primary taxonomy
Psychiatry Physician 2084P0800X
License number
A107289 CA
Self-reported in NPPES; status is on the state search
Practice location
61 Victory LN Ste A, Los Gatos, CA 95030
Phone
(408) 363-6533
Enumerated
May 1, 2009
Record last updated
May 5, 2023
Fax
(408) 784-3453
Medicare enrollment
Enrolled (PECOS I20150115001706); accepts Medicare assignment
Medical or professional school
Michigan State University College Of Human Medicine, 2006
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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Also registered at 61 Victory LN Ste A

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

  1. Brandon Phan, PMHNPPsychiatric/Mental Health Nurse Practitioner1831979863

Verify Thinh Duy Mai in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A107289
    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
Open 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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3.7 times the Medicare Part D claims of the average psychiatry physician in 2024

3,748 Medicare Part D claims for 172 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.

  1. Thinh Mai3,748
  2. Specialty average1,000

Most prescribed

  1. Quetiapine Fumarate262 claims
  2. Risperidone199 claims
  3. Clonazepam196 claims
  4. Olanzapine194 claims
  5. Trazodone Hcl138 claims
  6. Sertraline Hcl133 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $6,312.23

233 payments; by number, the most common kind was food and beverage; the largest payer was Teva Pharmaceuticals USA, Inc. The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Thinh Mai$6,312.23
  2. Specialty average$4,954.93

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through 2 group practices

  1. Golden Valley Health CentersManteca, CA
  2. Thinh Duy Mai MD ApcLos Gatos, CA

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

Thinh Duy Mai among 8,673 psychiatry physician records in California

Thinh Duy Mai, MD is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 57% of them.

  • NPI issued2009 · 57% of these records are older, 40% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileYes · 38% of these records are
  • Graduated2006 · median 2005 among the 3,295 with a school on file
  • Record last updated2023 · 54% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

19 psychiatry physician records list a practice address in Los Gatos

They are 19 of the 1,905 NPPES records with a practice address in Los Gatos, and 8,673 psychiatry physician records in California.

The 8 psychiatry physician records with the nearest ZIP codes

  1. Susan Greenberg-Englander, M.D.Los Gatos, CA 950301093025314
  2. John Greene, MDLos Gatos, CA 950301710086384
  3. Danielle Sukonick, M.D.Los Gatos, CA 950301932317039
  4. Manoj Waikar, M.D.Los Gatos, CA 950301821150574
  5. Mark Davidow, M.D.Los Gatos, CA 950321053437228
  6. Patrick Fitzsimmons, M.D.Los Gatos, CA 950321528109550
  7. Anita Hirsch, M.D.Los Gatos, CA 950321619062486
  8. Michelle Indianer, D.O.Los Gatos, CA 950321194885871

Common questions

What is Thinh Duy Mai, MD's NPI number?

Thinh Duy Mai, MD's National Provider Identifier (NPI) is 1558505750, issued on May 1, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Thinh Duy Mai, MD located?

The NPPES record lists a practice address at 61 Victory LN Ste A, Los Gatos, CA, 95030. Phone: (408) 363-6533. Providers update this record themselves, so call before visiting.

How can I verify Thinh Duy Mai, MD's license?

NPPES lists California license number A107289, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Thinh Duy Mai, MD prescribe under Medicare Part D?

In 2024, Thinh Duy Mai, MD had 3,748 Medicare Part D claims for 172 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions 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.