Ivan Daniel Mayor, MD
Psychiatry Physician · Palo Alto, CA
Ivan Daniel Mayor, MD is a psychiatry physician with a practice address in Palo Alto, California, and NPI 1225615594, issued on Mar 24, 2021. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ivan Daniel Mayor
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 14196745-1205 UT
Self-reported in NPPES; status is on the state search - Practice location
- 401 Quarry RD, Palo Alto, CA 94304
- Phone
- (650) 725-5591
- Enumerated
- Mar 24, 2021
- Record last updated
- Jan 15, 2025
- 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.
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Verify Ivan Daniel Mayor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average psychiatry physician in 2024
83 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Trazodone Hcl12 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.
Ivan Daniel Mayor among 8,673 psychiatry physician records in California
Ivan Daniel Mayor, 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 2021, is newer than 91% of them.
- NPI issued2021 · 91% of these records are older, 7% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2025 · 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 Ivan Daniel Mayor, MD's NPI number?
Ivan Daniel Mayor, MD's National Provider Identifier (NPI) is 1225615594, issued on Mar 24, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Ivan Daniel Mayor, MD located?
The NPPES record lists a practice address at 401 Quarry RD, Palo Alto, CA, 94304. Phone: (650) 725-5591. Providers update this record themselves, so call before visiting.
How can I verify Ivan Daniel Mayor, MD's license?
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 Ivan Daniel Mayor, MD prescribe under Medicare Part D?
In 2024, Ivan Daniel Mayor, MD had 83 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.