San Tso, D.O.
Family Medicine Physician · Stockton, CA
San Tso, D.O. is a family medicine physician with a practice address in Stockton, California, and NPI 1598876716, issued on Aug 31, 2006. Check the license (California 20A7328, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- San Tso
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A7328 CA
Self-reported in NPPES; status is on the state search - Practice location
- 77 W March LN, Stockton, CA 95207
- Phone
- (209) 477-5552
- Enumerated
- Aug 31, 2006
- Record last updated
- Mar 16, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (209) 477-5553
- Medicaid ID
- 00AX73280 CA
- Medicare enrollment
- Enrolled (PECOS I20041230000734); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify San Tso in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A7328Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average family medicine physician in 2024
8,333 Medicare Part D claims for 772 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 85 claims were for opioids.
Most prescribed
- Amlodipine Besylate571 claims
- Losartan Potassium538 claims
- Atorvastatin Calcium516 claims
- Metformin Hcl437 claims
- Levothyroxine Sodium383 claims
- Lisinopril274 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.
Industry payments in 2024: $2,444.89
144 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- HT Family Physicians IncLodi, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
San Tso among 17,133 family medicine physician records in California
San Tso, D.O. 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2000 · median 2005 among the 10,652 with a school on file
- Record last updated2020 · 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).
116 family medicine physician records list a practice address in Stockton
They are 116 of the 9,522 NPPES records with a practice address in Stockton, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Stockton → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Poonam Duggal, MDStockton, CA 952071356386510
- Bao Nguyen, MDStockton, CA 952071821032475
- Justin Noonan, NPStockton, CA 952071972297927
- Edward Schneider, MDStockton, CA 952071215919014
- Annette Seiler, MDStockton, CA 952071629008339
- Clyde Wong, MDStockton, CA 952071487686473
- Michael Fox, MDStockton, CA 952061912069758
- John Bylsma, MDStockton, CA 952091972569416
Common questions
What is San Tso, D.O.'s NPI number?
San Tso, D.O.'s National Provider Identifier (NPI) is 1598876716, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is San Tso, D.O. located?
The NPPES record lists a practice address at 77 W March LN, Stockton, CA, 95207. Phone: (209) 477-5552. Providers update this record themselves, so call before visiting.
How can I verify San Tso, D.O.'s license?
NPPES lists California license number 20A7328, 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 San Tso, D.O. prescribe under Medicare Part D?
In 2024, San Tso, D.O. had 8,333 Medicare Part D claims for 772 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.