Judy D. Mamaclay, MD
Geriatric Medicine (Internal Medicine) Physician · San Francisco, CA
Judy D. Mamaclay, MD is a geriatric medicine (internal medicine) physician with a practice address in San Francisco, California, and NPI 1457357618, issued on Jun 22, 2005. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Judy D. Mamaclay
- Credential
- MD
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- 040859 CT
Self-reported in NPPES; status is on the state search - Practice location
- 4131 Geary Blvd, San Francisco, CA 94118
- Phone
- (415) 418-9114
- Enumerated
- Jun 22, 2005
- Record last updated
- Mar 15, 2025
- Medicaid ID
- 001408592 CT
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 532 in California → Look up another NPI →
Also registered at 4131 Geary Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michele BittnerOccupational Therapist1962562280
- Yuliya BlyakherovaPharmacist1467811711
- Kimberly Boigon, PHYSICAL THERAPISTPhysical Therapist1790831980
- Karen Chan-Lee, B.S.PHARM.Pharmacist1881770980
- Erin Chang, PHARMDAmbulatory Care Pharmacist1992084545
- Gilbert Cheu, PHARM.D.Pharmacist1508959313
Verify Judy D. Mamaclay 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
48% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
2,202 Medicare Part D claims for 221 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. 36 claims were for opioids.
Most prescribed
- Atorvastatin Calcium168 claims
- Pantoprazole Sodium122 claims
- Amlodipine Besylate90 claims
- Metoprolol Tartrate81 claims
- Lisinopril66 claims
- Donepezil Hcl62 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.
Judy D. Mamaclay among 532 geriatric medicine (internal medicine) physician records in California
Judy D. Mamaclay, MD is one of 532 geriatric medicine (internal medicine) physician records with a practice address in California. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 51% of these records are
- Record last updated2025 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in California
There are 532 geriatric medicine (internal medicine) physician records in California.
All 532 in California → Every provider in San Francisco → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Pei Chen, MDSan Francisco, CA 941181295054948
- Stephanie Cordonnier, MDSan Francisco, CA 941181588230809
- Stephanie Rogers, M.D.San Francisco, CA 941181639469877
- Carolyn Welty, M.D.San Francisco, CA 941181669403853
- Leslie Kernisan, M.D.San Francisco, CA 941171215968797
- Namita Kansal, MDSan Francisco, CA 941161184883415
- Helena Katz, MDSan Francisco, CA 941161285774414
- Lydia Lukian, MDSan Francisco, CA 941161932249125
Common questions
What is Judy D. Mamaclay, MD's NPI number?
Judy D. Mamaclay, MD's National Provider Identifier (NPI) is 1457357618, issued on Jun 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Judy D. Mamaclay, MD located?
The NPPES record lists a practice address at 4131 Geary Blvd, San Francisco, CA, 94118. Phone: (415) 418-9114. Providers update this record themselves, so call before visiting.
How can I verify Judy D. Mamaclay, 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 Judy D. Mamaclay, MD prescribe under Medicare Part D?
In 2024, Judy D. Mamaclay, MD had 2,202 Medicare Part D claims for 221 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.