Will Tseng, M.D.
Critical Care Medicine (Internal Medicine) Physician · San Jose, CA
Will Tseng, M.D. is a critical care medicine (internal medicine) physician with a practice address in San Jose, California, and NPI 1013176213, issued on Jun 3, 2008. Check the license (California A105896, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Will Tseng
- Credential
- M.D.
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- A105896 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2520 Samaritan Dr, San Jose, CA 95124
- Phone
- (408) 356-8400
- Enumerated
- Jun 3, 2008
- Record last updated
- Aug 18, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (408) 356-0974
- Medicare enrollment
- Enrolled (PECOS I20100823001045); accepts Medicare assignment
- Medical or professional school
- Geisel School Of Medicine At Dartmouth, 2007
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 723 in California → Look up another NPI →
Also registered at 2520 Samaritan Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marwan Balaa, MDGastroenterology Physician1689652935
- Sj Salfen, M.D.Pulmonary Disease Physician1477647485
Verify Will Tseng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A105896Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% more Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
851 Medicare Part D claims for 177 beneficiaries, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D. Brand-name drugs were 72% of claims.
Most prescribed
- Trelegy Ellipta144 claims
- Albuterol Sulfate Hfa100 claims
- Anoro Ellipta97 claims
- Stiolto Respimat59 claims
- Breztri Aerosphere47 claims
- Symbicort38 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: $455.59
16 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 2,708 providers of this specialty with any payment received $2,958.68 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
- Sutter Bay Medical FoundationSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Will Tseng among 723 critical care medicine (internal medicine) physician records in California
Will Tseng, M.D. is one of 723 critical care medicine (internal medicine) physician records with a practice address in California. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 54% of them.
- NPI issued2008 · 54% of these records are older, 41% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2007 · median 2005 among the 559 with a school on file
- Record last updated2016 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in California
There are 723 critical care medicine (internal medicine) physician records in California.
All 723 in California → Every provider in San Jose → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Ravi Aggu Sher, MDSan Jose, CA 951241285898585
- Jennifer Lee, MDSan Jose, CA 951241720571318
- Jeffrey Marcus, MDSan Jose, CA 951241184815656
- Yasser Omar, M.D.San Jose, CA 951241649617572
- Veronica Ortiz, M.D.San Jose, CA 951241851592844
- Jennifer Parrish, D.O.San Jose, CA 951241639516057
- Karanpal Sandhu, M.D.San Jose, CA 951241457792178
- Arun Sharma, MDSan Jose, CA 951241558540427
Common questions
What is Will Tseng, M.D.'s NPI number?
Will Tseng, M.D.'s National Provider Identifier (NPI) is 1013176213, issued on Jun 3, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Will Tseng, M.D. located?
The NPPES record lists a practice address at 2520 Samaritan Dr, San Jose, CA, 95124. Phone: (408) 356-8400. Providers update this record themselves, so call before visiting.
How can I verify Will Tseng, M.D.'s license?
NPPES lists California license number A105896, 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 Will Tseng, M.D. prescribe under Medicare Part D?
In 2024, Will Tseng, M.D. had 851 Medicare Part D claims for 177 beneficiaries; the average among critical care medicine (internal medicine) physician prescribers was 696. 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.