Thomas Tai Hon Chen, MD
Medical Oncology Physician · San Jose, CA
Thomas Tai Hon Chen, MD is a medical oncology physician with a practice address in San Jose, California, and NPI 1891870317, issued on Oct 25, 2006. Check the license (California G84369, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas Tai Hon Chen
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- G84369 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2589 Samaritan Dr Ste 200, San Jose, CA 95124
- Phone
- (408) 426-4900
- Enumerated
- Oct 25, 2006
- Record last updated
- Apr 17, 2024
- Medicaid ID
- 00G843690 CA
- Medicare enrollment
- Enrolled (PECOS I20051207000503); accepts Medicare assignment
- Medical or professional school
- Stanford University School Of Medicine, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 447 in California → Look up another NPI →
Verify Thomas Tai Hon Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G84369Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% more Medicare Part D claims than the average medical oncology physician in 2024
992 Medicare Part D claims for 194 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims. 30 claims were for opioids.
Most prescribed
- Hydroxyurea77 claims
- Prednisone56 claims
- Dexamethasone47 claims
- Eliquis47 claims
- Ondansetron Hcl45 claims
- Prochlorperazine Maleate40 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: $128.77
1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 3,343 providers of this specialty with any payment received $11,773.47 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.
One hospital affiliation
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Thomas Tai Hon Chen among 447 medical oncology physician records in California
Thomas Tai Hon Chen, MD is one of 447 medical oncology physician records with a practice address in California. 82% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1996 · median 2004 among the 312 with a school on file
- Record last updated2024 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in California
There are 447 medical oncology physician records in California.
All 447 in California → Every provider in San Jose → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Rajeshwari Ayyar, MDSan Jose, CA 951241871670703
- Teja Bedi, MDSan Jose, CA 951241871777573
- Hinda Boutrid, MDSan Jose, CA 951241457796070
- Elwyn Cabebe, MDSan Jose, CA 951241821067281
- Peter Galatin, M.D., PH.D.San Jose, CA 951241942311386
- Priya Kumaravelu, MDSan Jose, CA 951241154514677
- George Labban, M.D.San Jose, CA 951241114925542
- Martha Man, MDSan Jose, CA 951241518976042
Common questions
What is Thomas Tai Hon Chen, MD's NPI number?
Thomas Tai Hon Chen, MD's National Provider Identifier (NPI) is 1891870317, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Tai Hon Chen, MD located?
The NPPES record lists a practice address at 2589 Samaritan Dr Ste 200, San Jose, CA, 95124. Phone: (408) 426-4900. Providers update this record themselves, so call before visiting.
How can I verify Thomas Tai Hon Chen, MD's license?
NPPES lists California license number G84369, 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 Thomas Tai Hon Chen, MD prescribe under Medicare Part D?
In 2024, Thomas Tai Hon Chen, MD had 992 Medicare Part D claims for 194 beneficiaries; the average among medical oncology physician prescribers was 703. 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.