Nishina Ann Thomas, MD
Psychiatry Physician · Palo Alto, CA
Nishina Ann Thomas, MD is a psychiatry physician with a practice address in Palo Alto, California, and NPI 1174933204, issued on Apr 29, 2014. Check the license (California A154908, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nishina Ann Thomas
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A154908 CA
Self-reported in NPPES; status is on the state search - Practice location
- 401 Quarry RD, Palo Alto, CA 94304
- Phone
- (650) 725-4070
- Enumerated
- Apr 29, 2014
- Record last updated
- Aug 5, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190507000827); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 2014
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 401 Quarry RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Abbey, PH.D.Clinical Neuropsychologist1730377649
- Dorothy Adu-Amankwah, MDPsychiatry Physician1932900313
- Nakul AggarwalStudent in an Organized Health Care Education/Training Program1881495976
- Rosa Ahn-Horst, MD MPHPsychiatry Physician1649822420
- Kelley Anderson, M.S., M.A., PHDPsychologist1851777999
- Robin Apple, PH.D.Psychologist1134284912
Verify Nishina Ann Thomas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A154908Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% fewer Medicare Part D claims than the average psychiatry physician in 2024
865 Medicare Part D claims for 45 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Divalproex Sodium Er87 claims
- Benztropine Mesylate80 claims
- Olanzapine49 claims
- Quetiapine Fumarate48 claims
- Propranolol Hcl43 claims
- Aripiprazole40 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 83.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Barton Medical FoundationSouth Lake Tahoe, CA
- Sheppard Pratt Physicians PAElkridge, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nishina Ann Thomas among 8,673 psychiatry physician records in California
Nishina Ann Thomas, 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 2014, is newer than 71% of them.
- NPI issued2014 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2014 · median 2005 among the 3,295 with a school on file
- Record last updated2018 · 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).
215 psychiatry physician records list a practice address in Palo Alto
They are 215 of the 7,617 NPPES records with a practice address in Palo Alto, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Palo Alto → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Elias Aboujaoude, MDPalo Alto, CA 943041649209768
- Steven Bagley, MDPalo Alto, CA 943041730125048
- Justin Birnbaum, M.D.Palo Alto, CA 943041013007848
- Kim Bullock, M.D.Palo Alto, CA 943041790842763
- Christopher Capelle, MDPalo Alto, CA 943041902919640
- John Dorfman, M. D.Palo Alto, CA 943041912944687
- Carla Galloway, M.D.Palo Alto, CA 943041790881506
- Robert Hayward, MD, MPHPalo Alto, CA 943041437216744
Common questions
What is Nishina Ann Thomas, MD's NPI number?
Nishina Ann Thomas, MD's National Provider Identifier (NPI) is 1174933204, issued on Apr 29, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Nishina Ann Thomas, MD located?
The NPPES record lists a practice address at 401 Quarry RD, Palo Alto, CA, 94304. Phone: (650) 725-4070. Providers update this record themselves, so call before visiting.
How can I verify Nishina Ann Thomas, MD's license?
NPPES lists California license number A154908, 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 Nishina Ann Thomas, MD prescribe under Medicare Part D?
In 2024, Nishina Ann Thomas, MD had 865 Medicare Part D claims for 45 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
What is Nishina Ann Thomas, MD's MIPS final score?
The 2023 MIPS final score is 83.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.