John Tso, M.D.
Family Medicine Physician · San Jose, CA
John Tso, M.D. is a family medicine physician with a practice address in San Jose, California, and NPI 1811160377, issued on Apr 6, 2008. Check the license (California A103220, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Tso
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A103220 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1870 Lundy Ave, San Jose, CA 95131
- Phone
- (408) 573-9686
- Enumerated
- Apr 6, 2008
- Record last updated
- Jan 17, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20081231000169); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1870 Lundy Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Tso in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A103220Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average family medicine physician in 2024
8,228 Medicare Part D claims for 576 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Amlodipine Besylate855 claims
- Atorvastatin Calcium628 claims
- Losartan Potassium317 claims
- Alendronate Sodium293 claims
- Metoprolol Succinate277 claims
- Rosuvastatin Calcium264 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.
Bills Medicare through one group practice
- North East Medical ServicesSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Tso among 17,133 family medicine physician records in California
John Tso, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 53% of them.
- NPI issued2008 · 53% of these records are older, 42% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1980 · median 2005 among the 10,652 with a school on file
- Record last updated2017 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
265 family medicine physician records list a practice address in San Jose
They are 265 of the 20,925 NPPES records with a practice address in San Jose, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Jose → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Feng Chen, MDSan Jose, CA 951311982285268
- Gavin Liu, DOSan Jose, CA 951311255951752
- Tim Nguyen, M.DSan Jose, CA 951311497193643
- Khae Saephanh, D.O.San Jose, CA 951311669588133
- Qingbo Sui, D.O.San Jose, CA 951311679996151
- Yuetin Wong, M.D.San Jose, CA 951311922399021
- Vincent Le, DOSan Jose, CA 951321760485171
- Denise Babin, MDSan Jose, CA 951291174848121
Common questions
What is John Tso, M.D.'s NPI number?
John Tso, M.D.'s National Provider Identifier (NPI) is 1811160377, issued on Apr 6, 2008. An NPI identifies a provider in billing; it is not a license.
Where is John Tso, M.D. located?
The NPPES record lists a practice address at 1870 Lundy Ave, San Jose, CA, 95131. Phone: (408) 573-9686. Providers update this record themselves, so call before visiting.
How can I verify John Tso, M.D.'s license?
NPPES lists California license number A103220, 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 John Tso, M.D. prescribe under Medicare Part D?
In 2024, John Tso, M.D. had 8,228 Medicare Part D claims for 576 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.