Janet Tseng, M.D.
Family Medicine Physician · Sunnyvale, CA
Janet Tseng, M.D. is a family medicine physician with a practice address in Sunnyvale, California, and NPI 1023363231, issued on Jul 13, 2012. Check the license (California A71916, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Janet Tseng
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A71916 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1270 Lawrence Station RD, Sunnyvale, CA 94089
- Phone
- (408) 364-6430
- Enumerated
- Jul 13, 2012
- Record last updated
- Jul 13, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Janet Tseng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A71916Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average family medicine physician in 2024
16 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
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.
Janet Tseng among 17,133 family medicine physician records in California
Janet Tseng, 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 2012, is newer than 66% of them.
- NPI issued2012 · 66% of these records are older, 32% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2012 · 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).
33 family medicine physician records list a practice address in Sunnyvale
They are 33 of the 1,690 NPPES records with a practice address in Sunnyvale, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Sunnyvale → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Katherine Hollinshead, MDSunnyvale, CA 940891588204606
- Kathy Vo, M.D.Sunnyvale, CA 940891730507849
- Natalia Abrikosova, M.D.Sunnyvale, CA 940871609061753
- Kevin Fell, MDSunnyvale, CA 940871215990494
- Buff Greider, M.D.Sunnyvale, CA 940871811915846
- Victoria Ho, M.D.Sunnyvale, CA 940871487219523
- Steven Kim, M.D.Sunnyvale, CA 940871043313992
- Sonali Ladha Ghosh, M.DSunnyvale, CA 940871265798508
Common questions
What is Janet Tseng, M.D.'s NPI number?
Janet Tseng, M.D.'s National Provider Identifier (NPI) is 1023363231, issued on Jul 13, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Janet Tseng, M.D. located?
The NPPES record lists a practice address at 1270 Lawrence Station RD, Sunnyvale, CA, 94089. Phone: (408) 364-6430. Providers update this record themselves, so call before visiting.
How can I verify Janet Tseng, M.D.'s license?
NPPES lists California license number A71916, 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 Janet Tseng, M.D. prescribe under Medicare Part D?
In 2024, Janet Tseng, M.D. had 16 Medicare Part D claims; 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.