Keith Hermanstyne
Psychiatry Physician · San Francisco, CA
Keith Hermanstyne is a psychiatry physician with a practice address in San Francisco, California, and NPI 1922321561, issued on Mar 10, 2010. Check the license (California A115322, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Keith Hermanstyne
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A115322 CA
Self-reported in NPPES; status is on the state search - Practice location
- 401 Parnassus Ave, San Francisco, CA 94143
- Phone
- (415) 476-7723
- Enumerated
- Mar 10, 2010
- Record last updated
- Nov 1, 2017 (not updated in 9 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 401 Parnassus Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sean Amegadzie, MDPsychiatry Physician1427685403
- Alexandra Apple, PHDClinical Neuropsychologist1033871207
- Regina Armas, LCSW, PH.D.Clinical Psychologist1730118217
Verify Keith Hermanstyne in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A115322Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average psychiatry physician in 2024
393 Medicare Part D claims for 30 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Trazodone Hcl44 claims
- Bupropion Xl37 claims
- Escitalopram Oxalate36 claims
- Aripiprazole26 claims
- Lurasidone Hcl25 claims
- Hydroxyzine Hcl20 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.
Keith Hermanstyne among 8,673 psychiatry physician records in California
Keith Hermanstyne 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 2010, is newer than 60% of them.
- NPI issued2010 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2017 · 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).
763 psychiatry physician records list a practice address in San Francisco
They are 763 of the 38,143 NPPES records with a practice address in San Francisco, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in San Francisco → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Amy Berlin, MDSan Francisco, CA 941431730131939
- Stuart Eisendrath, MDSan Francisco, CA 941431982656187
- Ellen Haller, MDSan Francisco, CA 941431891747119
- Mardi Horowitz, MDSan Francisco, CA 941431740234038
- Descartes Li, MDSan Francisco, CA 941431962454157
- Jonathan Lichtmacher, M.D.San Francisco, CA 941431891717203
- Sudha Prathikanti, MDSan Francisco, CA 941431245297084
- Victor Reus, MDSan Francisco, CA 941431154372449
Common questions
What is Keith Hermanstyne's NPI number?
Keith Hermanstyne's National Provider Identifier (NPI) is 1922321561, issued on Mar 10, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Keith Hermanstyne located?
The NPPES record lists a practice address at 401 Parnassus Ave, San Francisco, CA, 94143. Phone: (415) 476-7723. Providers update this record themselves, so call before visiting.
How can I verify Keith Hermanstyne's license?
NPPES lists California license number A115322, 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 Keith Hermanstyne prescribe under Medicare Part D?
In 2024, Keith Hermanstyne had 393 Medicare Part D claims for 30 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.