Thomas E. Singer, M.D.
Psychiatry Physician · Mill Valley, CA
Thomas E. Singer, M.D. is a psychiatry physician with a practice address in Mill Valley, California, and NPI 1679749147, issued on May 5, 2008. Check the license (California G25930, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas E. Singer
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- G25930 CA
Self-reported in NPPES; status is on the state search - Practice location
- 655 Summit Ave, Mill Valley, CA 94941
- Phone
- (415) 328-6590
- Enumerated
- May 5, 2008
- Record last updated
- Dec 2, 2024
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Verify Thomas E. Singer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G25930Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average psychiatry physician in 2024
32 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
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.
Thomas E. Singer among 8,673 psychiatry physician records in California
Thomas E. Singer, 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 2008, is newer than 52% of them.
- NPI issued2008 · 52% of these records are older, 43% 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).
22 psychiatry physician records list a practice address in Mill Valley
They are 22 of the 653 NPPES records with a practice address in Mill Valley, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Mill Valley → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Laura Davies, MDMill Valley, CA 949411730215633
- Tracy Foose, M.D.Mill Valley, CA 949411750509006
- Richard Goldwasser, MDMill Valley, CA 949411073605572
- Michael Grotjahn, M.D.Mill Valley, CA 949411649475450
- Thomas Hansen, M.D.Mill Valley, CA 949411629142187
- Howard Levene, MDMill Valley, CA 949411316073281
- Thomas Lowe, M.D.Mill Valley, CA 949411851300107
- Madeleine Meyer, M.D.Mill Valley, CA 949411851404685
Common questions
What is Thomas E. Singer, M.D.'s NPI number?
Thomas E. Singer, M.D.'s National Provider Identifier (NPI) is 1679749147, issued on May 5, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Thomas E. Singer, M.D. located?
The NPPES record lists a practice address at 655 Summit Ave, Mill Valley, CA, 94941. Phone: (415) 328-6590. Providers update this record themselves, so call before visiting.
How can I verify Thomas E. Singer, M.D.'s license?
NPPES lists California license number G25930, 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 Thomas E. Singer, M.D. prescribe under Medicare Part D?
In 2024, Thomas E. Singer, M.D. had 32 Medicare Part D claims; 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.