Thomas Yang Sun, MD
Medical Oncology Physician · Pleasanton, CA
Thomas Yang Sun, MD is a medical oncology physician with a practice address in Pleasanton, California, and NPI 1215468160, issued on Mar 22, 2017. Check the license (California A157081, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas Yang Sun
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- A157081 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5725 W Las Positas Blvd Ste 100A, Pleasanton, CA 94588
- Phone
- (925) 734-8130
- Enumerated
- Mar 22, 2017
- Record last updated
- Apr 29, 2024
- Medicare enrollment
- Enrolled (PECOS I20230720001170); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 2017
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 447 in California → Look up another NPI →
Also registered at 5725 W Las Positas Blvd Ste 100A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Olivia Chan, PA-CPhysician Assistant1407681802
- Lamson Nguyen, PA-CPhysician Assistant1255954988
- Kavitha Raj, MDMedical Oncology Physician1053450767
Verify Thomas Yang Sun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A157081Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% more Medicare Part D claims than the average medical oncology physician in 2024
762 Medicare Part D claims for 124 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. 25 claims were for opioids.
Most prescribed
- Eliquis68 claims
- Loperamide56 claims
- Prochlorperazine Maleate56 claims
- Prednisone53 claims
- Abiraterone Acetate49 claims
- Tagrisso38 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: $156.01
6 payments; by number, the most common kind was food and beverage; the largest payer was SpringWorks Therapeutics, Inc. 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 Yang Sun among 447 medical oncology physician records in California
Thomas Yang Sun, 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 2017, is newer than 85% of them.
- NPI issued2017 · 85% of these records are older, 11% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2017 · 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 Pleasanton → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Abinav Baweja, MDPleasanton, CA 945881770961575
- Barbara Egan, M.D.Pleasanton, CA 945881154418622
- Ruby Maini, MDPleasanton, CA 945881063906063
- Kavitha Raj, MDPleasanton, CA 945881053450767
- Rishi Sawhney, M.D.Pleasanton, CA 945881881812519
- Shihfan Yeh, M.D.Vallejo, CA 945891013145556
- Juraj Kavecansky, MDWalnut Creek, CA 945961942592563
- Ethan Schram, M.D.Walnut Creek, CA 945981659320703
Common questions
What is Thomas Yang Sun, MD's NPI number?
Thomas Yang Sun, MD's National Provider Identifier (NPI) is 1215468160, issued on Mar 22, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Yang Sun, MD located?
The NPPES record lists a practice address at 5725 W Las Positas Blvd Ste 100A, Pleasanton, CA, 94588. Phone: (925) 734-8130. Providers update this record themselves, so call before visiting.
How can I verify Thomas Yang Sun, MD's license?
NPPES lists California license number A157081, 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 Yang Sun, MD prescribe under Medicare Part D?
In 2024, Thomas Yang Sun, MD had 762 Medicare Part D claims for 124 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.