Susan Joseph, MD
Internal Medicine Physician · San Mateo, CA
Susan Joseph, MD is an internal medicine physician with a practice address in San Mateo, California, and NPI 1801960497, issued on Nov 17, 2006. Check the license (California G79794, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Susan Joseph
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G79794 CA
Self-reported in NPPES; status is on the state search - Practice location
- 222 W 39TH Ave, San Mateo, CA 94403
- Phone
- (650) 573-2222
- Enumerated
- Nov 17, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00G797940 CA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 222 W 39TH Ave
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Verify Susan Joseph in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G79794Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% more Medicare Part D claims than the average internal medicine physician in 2024
5,285 Medicare Part D claims for 581 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 88 claims were for opioids.
Most prescribed
- Atorvastatin Calcium474 claims
- Amlodipine Besylate356 claims
- Levothyroxine Sodium342 claims
- Metformin Hcl252 claims
- Omeprazole216 claims
- Losartan Potassium207 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.
Susan Joseph among 17,696 internal medicine physician records in California
Susan Joseph, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
44 internal medicine physician records list a practice address in San Mateo
They are 44 of the 3,909 NPPES records with a practice address in San Mateo, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Mateo → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Richard EhlingSan Mateo, CA 944031124187950
- Susan Ehrlich, MDSan Mateo, CA 944031942379474
- Indu Fotedar, MDSan Mateo, CA 944031508960766
- Evelyn Haddad, M.D.San Mateo, CA 944031295936755
- Grace Hassid, MDSan Mateo, CA 944031700957099
- Chester Kunnappilly, MDSan Mateo, CA 944031437220704
- Jennifer Lin, MDSan Mateo, CA 944031336342708
- Gary Pasternak, MDSan Mateo, CA 944031194820688
Common questions
What is Susan Joseph, MD's NPI number?
Susan Joseph, MD's National Provider Identifier (NPI) is 1801960497, issued on Nov 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Susan Joseph, MD located?
The NPPES record lists a practice address at 222 W 39TH Ave, San Mateo, CA, 94403. Phone: (650) 573-2222. Providers update this record themselves, so call before visiting.
How can I verify Susan Joseph, MD's license?
NPPES lists California license number G79794, 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 Susan Joseph, MD prescribe under Medicare Part D?
In 2024, Susan Joseph, MD had 5,285 Medicare Part D claims for 581 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.