Mary G. De May, M.D.
Geriatric Psychiatry Physician · San Francisco, CA
Mary G. De May, M.D. is a geriatric psychiatry physician with a practice address in San Francisco, California, and NPI 1134163298, issued on Jun 16, 2006. Check the license (California G62108, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary G. De May
- Credential
- M.D.
- Primary taxonomy
- Geriatric Psychiatry Physician 2084P0805X
- License number
- G62108 CA
Self-reported in NPPES; status is on the state search - Practice location
- 350 Parnassus Ave Suite 706, San Francisco, CA 94143
- Phone
- (415) 476-6880
- Enumerated
- Jun 16, 2006
- Record last updated
- Oct 19, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (415) 476-4800
- Medicaid ID
- 00G621080 CA
- Medicare enrollment
- Enrolled (PECOS I20041006000506); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Stony Brook, School Of Medicine, 1985
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest geriatric psychiatry physician records → All 87 in California → Look up another NPI →
Verify Mary G. De May in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G62108Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average geriatric psychiatry physician in 2024
197 Medicare Part D claims for 24 beneficiaries, against an average of 1,485 among the 473 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Escitalopram Oxalate45 claims
- Donepezil Hcl43 claims
- Rivastigmine19 claims
- Divalproex Sodium17 claims
- Galantamine Er15 claims
- Memantine Hcl11 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): 74.5 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
- Ucsf Medical Group Business ServicesBurlingame, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary G. De May among 87 geriatric psychiatry physician records in California
Mary G. De May, M.D. is one of 87 geriatric psychiatry physician records with a practice address in California. 61% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 45% newer
- In a Medicare fileYes · 61% of these records are
- In the CMS Doctors and Clinicians fileYes · 36% of these records are
- Graduated1985 · median 2000 among the 31 with a school on file
- Record last updated2012 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0805X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Psychiatry Physician providers in California
There are 87 geriatric psychiatry physician records in California.
All 87 in California → Every provider in San Francisco → Geriatric Psychiatry Physician nationwide →
The 8 geriatric psychiatry physician records with the nearest ZIP codes
- Zeba Hafeez, MDSan Francisco, CA 941431245434547
- Muniza Majoka, M.B.B.S.San Francisco, CA 941431770934168
- James Nelson, M.D.San Francisco, CA 941431457370579
- Kristine Yaffe, M.D.San Francisco, CA 941211861598559
- Richard Baldwin, M.D.San Francisco, CA 941171851486104
- Cristina Breiner, MDSan Francisco, CA 941121508965229
- Jai McQuilla, MDSan Francisco, CA 941121932789708
- Ryan Pate, MDSan Francisco, CA 941091235633116
Common questions
What is Mary G. De May, M.D.'s NPI number?
Mary G. De May, M.D.'s National Provider Identifier (NPI) is 1134163298, issued on Jun 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary G. De May, M.D. located?
The NPPES record lists a practice address at 350 Parnassus Ave Suite 706, San Francisco, CA, 94143. Phone: (415) 476-6880. Providers update this record themselves, so call before visiting.
How can I verify Mary G. De May, M.D.'s license?
NPPES lists California license number G62108, 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 Mary G. De May, M.D. prescribe under Medicare Part D?
In 2024, Mary G. De May, M.D. had 197 Medicare Part D claims for 24 beneficiaries; the average among geriatric psychiatry physician prescribers was 1,485. Part D covers Medicare prescriptions only.
What is Mary G. De May, M.D.'s MIPS final score?
The 2023 MIPS final score is 74.5 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.