May Cheng-Su Chen, MD
Medical Oncology Physician · Campbell, CA
May Cheng-Su Chen, MD is a medical oncology physician with a practice address in Campbell, California, and NPI 1386603447, issued on Mar 18, 2006. Check the license (California G83884, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- May Cheng-Su Chen
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- G83884 CA
Self-reported in NPPES; status is on the state search - Practice location
- 50 E Hamilton Ave, Campbell, CA 95008
- Phone
- (408) 376-2300
- Enumerated
- Mar 18, 2006
- Record last updated
- Oct 22, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (408) 376-2316
- Medicaid ID
- 00G838840 CA
- Medicare enrollment
- Enrolled (PECOS I20041210000590); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 50 E Hamilton Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charles Bass, M.DFamily Medicine Physician1902820814
- Nathalie Brophy, MDMedical Oncology Physician1265491450
- Tinny Dohn, D.OFamily Medicine Physician1710901285
- Diana Fink, M.DEmergency Medicine Physician1023021201
- Christian Fulmer, DOFamily Medicine Physician1285624650
- Melanie Martin, M.DFamily Medicine Physician1770507618
Verify May Cheng-Su Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G83884Check 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% fewer Medicare Part D claims than the average medical oncology physician in 2024
642 Medicare Part D claims for 161 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Prochlorperazine Maleate66 claims
- Ondansetron Hcl63 claims
- Anastrozole57 claims
- Dexamethasone33 claims
- Lorazepam24 claims
- Eliquis20 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: $155.00
2 payments; by number, the most common kind was 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.
Medical Oncology Physician providers in California
There are 447 medical oncology physician records in California.
Other medical oncology physician records in California
- Donald Abrams, MDSan Francisco, CA1679530018
- Ranjana Advani, MDStanford, CA1639225121
- Kambiz Afrasiabi, M.D.Anaheim, CA1578572368
- Mark Agulnik, MDLos Angeles, CA1164448734
- David Agus, M.D.Los Angeles, CA1356328249
- Weiyun Ai, MDSan Francisco, CA1649346842
- Shafqat Akhtar, MDRed Bluff, CA1700960788
- Luai Al Rabadi, M.D.San Francisco, CA1659637452
- Michael Alexander, MDSanta Cruz, CA1053321760
- Sandra AlgazeLos Angeles, CA1861886707
Common questions
What is May Cheng-Su Chen, MD's NPI number?
May Cheng-Su Chen, MD's National Provider Identifier (NPI) is 1386603447, issued on Mar 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is May Cheng-Su Chen, MD located?
The NPPES record lists a practice address at 50 E Hamilton Ave, Campbell, CA, 95008. Phone: (408) 376-2300. Providers update this record themselves, so call before visiting.
How can I verify May Cheng-Su Chen, MD's license?
NPPES lists California license number G83884, 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 May Cheng-Su Chen, MD prescribe under Medicare Part D?
In 2024, May Cheng-Su Chen, MD had 642 Medicare Part D claims for 161 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.