Wesley J. Tsai, MD
Hospitalist Physician · Vallejo, CA
Wesley J. Tsai, MD is a hospitalist physician with a practice address in Vallejo, California, and NPI 1750455077, issued on Nov 20, 2006. Check the license (California A84962, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Wesley J. Tsai
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A84962 CA
Self-reported in NPPES; status is on the state search - Practice location
- 975 Sereno Dr, Vallejo, CA 94589
- Phone
- (707) 651-1000
- Enumerated
- Nov 20, 2006
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A849620 CA
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 975 Sereno Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joel Aandahl, NPAdult Health Nurse Practitioner1891423653
- Noman Absar, MDCritical Care Medicine (Internal Medicine) Physician1205908951
- Anthony Acquaviva, MDUrology Physician1457439283
- Jhonnard James Acuna, CRNACertified Registered Nurse Anesthetist1205997327
- Omid AfshariPharmacist1184165391
- Eesha AftabStudent in an Organized Health Care Education/Training Program1770421687
Verify Wesley J. Tsai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A84962Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9.0 times the Medicare Part D claims of the average hospitalist physician in 2024
4,664 Medicare Part D claims for 559 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 92 claims were for opioids.
Most prescribed
- Atorvastatin Calcium349 claims
- Levothyroxine Sodium211 claims
- Amlodipine Besylate210 claims
- Tamsulosin Hcl163 claims
- Lisinopril146 claims
- Lisinopril-Hydrochlorothiazide130 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.
Wesley J. Tsai among 3,099 hospitalist physician records in California
Wesley J. Tsai, MD is one of 3,099 hospitalist physician records with a practice address in California. 90% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 73% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileNo · 81% of these records are
- Record last updated2021 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Vallejo → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Mark Anisman, MDVallejo, CA 945891770661597
- Tom Cheng, MDVallejo, CA 945891215015102
- Michael Clark, MDVallejo, CA 945891114005949
- Ine George, MDVallejo, CA 945891043398886
- Michael George, MDVallejo, CA 945891356429195
- Mandeep Jhutti, D.O.Vallejo, CA 945891841378668
- Yan Konson, MDVallejo, CA 945891265510077
- Airi Kopperoinen, MDVallejo, CA 945891497833214
Common questions
What is Wesley J. Tsai, MD's NPI number?
Wesley J. Tsai, MD's National Provider Identifier (NPI) is 1750455077, issued on Nov 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Wesley J. Tsai, MD located?
The NPPES record lists a practice address at 975 Sereno Dr, Vallejo, CA, 94589. Phone: (707) 651-1000. Providers update this record themselves, so call before visiting.
How can I verify Wesley J. Tsai, MD's license?
NPPES lists California license number A84962, 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 Wesley J. Tsai, MD prescribe under Medicare Part D?
In 2024, Wesley J. Tsai, MD had 4,664 Medicare Part D claims for 559 beneficiaries; the average among hospitalist physician prescribers was 521. 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.