Vivian Tsai, M.D.
Cardiovascular Disease Physician · Fremont, CA
Vivian Tsai, M.D. is a cardiovascular disease physician with a practice address in Fremont, California, and NPI 1770534182, issued on May 12, 2006. Check the license (California A88245, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Vivian Tsai
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- A88245 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3200 Kearney Street, Fremont, CA 94538
- Phone
- (510) 490-1222
- Enumerated
- May 12, 2006
- Record last updated
- May 28, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20061121000687); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 2,574 in California → Look up another NPI →
Also registered at 3200 Kearney Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Vivian Tsai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A88245Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% more Medicare Part D claims than the average cardiovascular disease physician in 2024
5,010 Medicare Part D claims for 379 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Atorvastatin Calcium706 claims
- Metoprolol Succinate530 claims
- Amlodipine Besylate382 claims
- Eliquis365 claims
- Rosuvastatin Calcium235 claims
- Losartan Potassium185 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 2 group practices
- Sutter Bay Medical FoundationMilpitas, CA
- Washington Township Hospital DistrictFremont, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Vivian Tsai among 2,574 cardiovascular disease physician records in California
Vivian Tsai, M.D. is one of 2,574 cardiovascular disease physician records with a practice address in California. 83% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 45% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2003 · median 1999 among the 1,742 with a school on file
- Record last updated2020 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in California
There are 2,574 cardiovascular disease physician records in California.
All 2,574 in California → Every provider in Fremont → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Sangeetha Balakrishnan, M.D.Fremont, CA 945381326055658
- Carl Carlson, M.D.Fremont, CA 945381386669489
- Vanessa Go, MDFremont, CA 945381780762351
- Aung Hla, MDFremont, CA 945381588749246
- Ingrid Hogberg, M.D.Fremont, CA 945381275683286
- Ashit Jain, M.D.Fremont, CA 945381154344919
- Romesh Japra, M.D.Fremont, CA 945381144250184
- Pradeep Kumar, MD FACC FSCAIFremont, CA 945381295838746
Common questions
What is Vivian Tsai, M.D.'s NPI number?
Vivian Tsai, M.D.'s National Provider Identifier (NPI) is 1770534182, issued on May 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Vivian Tsai, M.D. located?
The NPPES record lists a practice address at 3200 Kearney Street, Fremont, CA, 94538. Phone: (510) 490-1222. Providers update this record themselves, so call before visiting.
How can I verify Vivian Tsai, M.D.'s license?
NPPES lists California license number A88245, 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 Vivian Tsai, M.D. prescribe under Medicare Part D?
In 2024, Vivian Tsai, M.D. had 5,010 Medicare Part D claims for 379 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. 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.