Stephen Tseng, MD
Internal Medicine Physician · Ione, CA
Stephen Tseng, MD is an internal medicine physician with a practice address in Ione, California, and NPI 1346328077, issued on Nov 1, 2006. Check the license (California A69139, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Stephen Tseng
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A69139 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4001 Highway 104, Ione, CA 95640
- Phone
- (209) 274-4911
- Enumerated
- Nov 1, 2006
- Record last updated
- Oct 24, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicaid ID
- 00A691390 CA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
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Verify Stephen Tseng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A69139Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Stephen Tseng among 17,696 internal medicine physician records in California
Stephen Tseng, 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 not. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2008 · 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).
3 internal medicine physician records list a practice address in Ione
They are 3 of the 94 NPPES records with a practice address in Ione, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,696 in California → Every provider in Ione → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Wesley Hashimoto, M.D.Ione, CA 956401902080112
- Christopher Smith, M.D.Ione, CA 956401770782302
- Craig Hall, MDJackson, CA 956421013920628
- Robert Hartmann, MDJackson, CA 956421922019017
- Scott Heatley, M.D.Jackson, CA 956421275609729
- Puneet Kaur, M.D.Jackson, CA 956421548537871
- Darrel Kerr, MDJackson, CA 956421437160538
- Dennis Nousaine, M.D.Jackson, CA 956421528079621
Common questions
What is Stephen Tseng, MD's NPI number?
Stephen Tseng, MD's National Provider Identifier (NPI) is 1346328077, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Tseng, MD located?
The NPPES record lists a practice address at 4001 Highway 104, Ione, CA, 95640. Phone: (209) 274-4911. Providers update this record themselves, so call before visiting.
How can I verify Stephen Tseng, MD's license?
NPPES lists California license number A69139, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.