NPPES file of Aug 9, 2026

Alex A. Terreau, M.D.

Psychiatry Physician · Nicasio, CA

Alex A. Terreau, M.D. is a psychiatry physician with a practice address in Nicasio, California, and NPI 1295001923, issued on Mar 27, 2012. Check the license (California A119883, 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
1295001923
Name
Alex A. Terreau
Credential
M.D.
Primary taxonomy
Psychiatry Physician 2084P0800X
License number
A119883 CA
Self-reported in NPPES; status is on the state search
Practice location
6967 Lucas Valley Road, Nicasio, CA 94946
Phone
(707) 835-4513
Enumerated
Mar 27, 2012
Record last updated
Feb 20, 2024
Fax
(707) 630-0770
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →

Verify Alex A. Terreau in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A119883    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.

Is this page about you? You can ask us to correct, restrict or remove it: how.

92% fewer Medicare Part D claims than the average psychiatry physician in 2024

84 Medicare Part D claims for 15 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.

  1. Alex Terreau84
  2. Specialty average1,000

Most prescribed

  1. Bupropion Hcl Sr14 claims
  2. Bupropion Xl14 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.

Alex A. Terreau among 8,673 psychiatry physician records in California

Alex A. Terreau, M.D. 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 2012, is newer than 66% of them.

  • NPI issued2012 · 66% of these records are older, 31% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileNo · 38% of these records are
  • Record last updated2024 · 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).

Psychiatry Physician providers in California

There are 8,673 psychiatry physician records in California.

All 8,673 in California → Psychiatry Physician nationwide →

The 8 psychiatry physician records with the nearest ZIP codes

  1. Jeffrey Berlant, M.D.Novato, CA 949471720026495
  2. Larry Hetrick, M.D.Novato, CA 949471962535419
  3. Michael Marsili, M.D.Novato, CA 949471043372840
  4. Lauren Tipton, MDNovato, CA 949451881191591
  5. Harvey Lerchin, M.D.Novato, CA 949491316057904
  6. James McQuade, M.D.Novato, CA 949491467466680
  7. Brigitte Apfel, M.D.Mill Valley, CA 949411073780714
  8. Jean Bolen, M.D.Mill Valley, CA 949411689099665

Common questions

What is Alex A. Terreau, M.D.'s NPI number?

Alex A. Terreau, M.D.'s National Provider Identifier (NPI) is 1295001923, issued on Mar 27, 2012. An NPI identifies a provider in billing; it is not a license.

Where is Alex A. Terreau, M.D. located?

The NPPES record lists a practice address at 6967 Lucas Valley Road, Nicasio, CA, 94946. Phone: (707) 835-4513. Providers update this record themselves, so call before visiting.

How can I verify Alex A. Terreau, M.D.'s license?

NPPES lists California license number A119883, 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 Alex A. Terreau, M.D. prescribe under Medicare Part D?

In 2024, Alex A. Terreau, M.D. had 84 Medicare Part D claims for 15 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.

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.